DMFlags

DMFlags

Flag Name	Console shortcut	Value	Description
Disallow health (In Deathmatch)	SV_NoHealth	1	Prevents health from spawning on the map.
Disallow powerups (In Deathmatch)	SV_NoItems	2	Prevents powerups from spawning on the map. Note: This dmflag is non functional as per https://forum.zdoom.org/viewtopic.php?f=7&t=14285
Weapons stay (In Deathmatch)	SV_WeaponStay	4	Weapons remain after being picked up by a player.
Falling damage (ZDoom)	SV_OldFallDamage	8	Enables the falling damage used from ZDoom.
Falling damage (Hexen)	SV_FallDamage	16	Enables the stronger but less aggressive falling damage used from Hexen.
Falling damage (Strife)	SV_OldFallDamage & SV_FallDamage	8 + 16	Combining both values for ZDoom and Hexen enables the falling damage used from Strife. The minimum amount of damage you take from falling in Strife is 52. Ouch!
		32	(unused)
Stay on the same map (In Deathmatch)	SV_SameLevel	64	Stay on the same map when someone exits.
Spawn farthest (In Deathmatch)	SV_SpawnFarthest	128	Spawn players as far as possible from other players.
Force respawn (In Deathmatch)	SV_ForceRespawn	256	Forces the players that were killed to respawn. Requires alwaysapplydmflags to be 'true' to have an effect outside of deathmatch mode.
Disallow armor (In Deathmatch)	SV_NoArmor	512	Prevents armor from spawning on the map.
Disallow exit (In Deathmatch)	SV_NoExit	1024	Kill anyone that tries to exit from the map.
Infinite ammo	SV_InfiniteAmmo	2048	Players have infinite ammo.
No monsters	SV_NoMonsters	4096	Monsters do not spawn on the map.
Monsters respawn	SV_MonsterRespawn	8192	Monsters will respawn sometime after their death.
Items respawn	SV_ItemRespawn	16384	Items respawn after being picked up by a player. However, mega powerups (i.e: invisibility, invulnerability) will not respawn. Note: Doom's 'RadSuit' and Heretic's 'Wings of Wrath' will always respawn in survival regardless of this CVar's value.
Fast monsters	SV_FastMonsters	32768	Monsters are more aggressive, and both they and projectiles use their FastSpeed property instead of their speed.
Disallow jump	SV_NoJump	65536	Prevents players from jumping.
Allow jumping	SV_AllowJump	131072	Allows the players to jump regardless of the MAPINFO NoJumping argument.
Disallow freelook	SV_NoFreelook	262144	Prevents the players from being able to freelook.
Mega powerups respawn	SV_RespawnSuper	524288	Allows mega powerups (i.e: invisibility, invulnerability) to respawn. Requires sv_itemrespawn to be 'true'.
Disallow FOV	SV_NoFOV	1048576	Disallows the clients to use a different Field of View value. [Default: 90]
Don't spawn multiplayer weapons (In Cooperative)	SV_NoWeaponSpawn	2097152	Prevents 'multiplayer only' weapons from spawning.
Disallow crouch	SV_NoCrouch	4194304	Disallow players ability to crouch.
Allow crouch	SV_AllowCrouch	8388608	Allow players to crouch regardless of the NoCrouch flag on the MAPINFO lump.
Lose inventory (In Cooperative)	SV_Coop_LoseInventory	16777216	Players lose all of their inventory when killed.
Lose keys (In Cooperative)	SV_Coop_LoseKeys	33554432	Players will lose all of their keys when killed.
Lose weapons (In Cooperative)	SV_Coop_LoseWeapons	67108864	Players will lose all of their weapons when killed.
Lose armor (In Cooperative)	SV_Coop_LoseArmor	134217728	Players will lose all of their armor when killed.
Lose powerups (In Cooperative)	SV_Coop_LosePowerups	268435456	Players will lose all of their powerups when killed.
Lose ammo (In Cooperative)	SV_Coop_LoseAmmo	536870912	Players will lose all their ammo when killed.
Lose half ammo	SV_Coop_HalveAmmo	1073741824	Players lose half of their ammo when killed.

DMFlags2

Flag Name	Console shortcut	Value	Description
		1	(unused)
Drop weapons	SV_WeaponDrop	2	Players drop their current weapon when killed or fragged.
Don't spawn runes	SV_NoRunes	4	Prevents runes from spawning on the map.
Instant flag return (ST/CTF)	SV_InstantReturn	8	Flags are instantly returned when the carriers are fragged.
No team switching (ST/CTF)	SV_NoTeamSwitch	16	Players cannot change teams after already being on a team.
Server picks teams (ST/CTF)	SV_NoTeamSelect	32	Players are placed in teams automatically by the server.
Double ammo	SV_DoubleAmmo	64	Double amount of ammo that items give you like skill 0 and 4 do.
Degeneration	SV_Degeneration	128	Players slowly lose health when above 100%, like in Quake.
Allow BFG freeaiming	SV_BFGFreeAim	256	Allows the BFG to be fired vertically.
Barrels respawn	SV_BarrelRespawn	512	Barrels respawn after being blown up -- only works in non-deathmatch game modes if "alwaysapplydmflags" is true!
No respawn protection (In Deathmatch)	SV_NoRespawnInvul	1024	Players do not have temporary invulnerability when respawning.
Start with shotgun (In Cooperative)	SV_ShotgunStart	2048	Players will have a shotgun when they spawn.
Spawn where died (In Cooperative)	SV_SameSpawnSpot	4096	Players respawn at the same location they were killed at.
Keep frags	SV_KeepFrags	8192	The clients frags are never reset when advancing to the next map.
No respawning	SV_NoRespawn	16384	Players can not respawn once killed or fragged.
Lose frag when fragged	SV_LoseFrag	32768	When fragged, the player will lose a frag point.
Infinite inventory	SV_InfiniteInventory	65536	When true, using an inventory item will not expend it.
Kill all monsters (In Cooperative)	SV_KillAllMonsters	131072	All monsters must be killed before advancing into the next map.
Disallow automap	SV_NoAutomap	262144	Disallow players to utilize the Automap.
Disallow allies on automap	SV_NoAutomapAllies	524288	Disallow players to see allies on the Automap.
Disallow spying	SV_DisallowSpying	1048576	Disallow players from spying other players.
Chasecam	SV_Chasecam	2097152	Allow the players to utilize the chasecam feature.
Disallow suicide	SV_DisallowSuicide	4194304	Disallow the players to use the 'kill' CCMD.
Disallow autoaim	SV_NoAutoaim	8388608	Disallow the clients to utilize Autoaim regardless of the players settings.
Check ammo for weapon switch	SV_DontCheckAmmo	16777216	Chooses whether having ammunition in your inventory is needed to be able to switch to a weapon.
Killing Romero kills all his spawns	SV_KillBossMonst	33554432	This option makes it so the death of the BossBrain kills all monsters created by the BossEye before ending the level, allowing a 100% kill tally on the intermission screen.
Count monsters in end level sectors	SV_NoCountEndMonst	67108864	This option makes monsters placed in sectors with the dDamage_End type (as used in Doom E1M8) not count towards the total.

ZaDMFlags

Flag Name	Console shortcut	Value	Description
Never identify players	SV_NoIdentifyTarget	1	If this is true, clients can never identify other players when pointing at them.
Enforce LMS spectator settings	SV_ApplyLMSSpectatorSettings	2	If this is true, lms_spectatorchat will be respected in all game modes.
Don't draw Coop Info	SV_NoCoopInfo	4	If true, this disallows clients to utilize the Coop Info CVar regardless if enabled from the clients CVar.
Disable unlagged	SV_NoUnlagged	8	Disables unlagged support for all clients. (default false)
Disable player collisions	SV_UnblockPlayers	16	Allows players to pass through each other. Great for small or cramped maps on Multiplayer.
No medals	SV_NoMedals	32	When this is set to true, the 'medals' feature will be disabled and will not be displayed nor upkept within the game.
Share keys	SV_ShareKeys	64	For Cooperative and Survival game modes, when this is set to true, picking up a key gives the key to all players.
Keep teams	SV_KeepTeams	128	Players that were already in teams before the map change will continue to be on the same team on the next map.
Force Video defaults	SV_ForceVideoDefaults	256	If this is enabled, some default rendering options are enforced, i.e. clients render as if gl_texture == 1 gl_lightmode == 3 gl_light_ambient == 20.0 gl_fogmode == 1 gl_lights_size == 1 r_3dfloors == 1
No rocket jumping	SV_NoRocketJumping	512	Disallow players from rocket jumping.
Award damage instead of kills	SV_AwardDamageInsteadKills	1024	Players will be awarded points from the damage that they do on monsters, besides awarding by kills.
Force alpha	SV_ForceAlpha	2048	If this is enabled, clients are enforced to display alpha, i.e. render as if r_drawtrans was enabled.
Only spawn single player actors in coop	SV_Coop_SPActorSpawn	4096	If this is true in a cooperative game mode, map actors are spawned as if the game was single player.
Emulate vanilla blood brightness.	sv_MaxbloodScalar	8192	Forces blood brightness to max when damaged.
Unblock players on same team	sv_UnblockAllies	16384	Allows players of the same team to pass through each other only.
Don't allow dropping.	sv_NoDrop	32768	Prevents players from dropping items.
No map reset	sv_Survival_NoMapResetOnDeath	65536	In a Survival game, the map is not reset if all players die.
Dead players keep inventory	sv_DeadPlayersCanKeepInventory	131072	In a Survival game, when a player loses all of their lives, they keep their inventory.
No unlagged BFG tracers	sv_NoUnlaggedBFGTracers	262144	If true, prevents use of backwards reconcilation for the hitscan tracers fired from the BFG9000.
No manually closing doors	sv_NoDoorClose	524288	If true, stops doors from being manually closed, preventing players from intentionally (or unintentionally) griefing by closing doors that other players (or the same player) have opened.
Force software pitch limits	sv_ForceSoftwarePitchLimits	1048576	Forces everyone's pitch, including those playing in the OpenGL renderer, to what's allowed in the software renderer.
Shoot through allies	sv_ShootThroughAllies	2097152	Allows a player's attacks, whether hitscans or projectiles, to safely pass through their teammates and friendly monsters. This is ignored by actors who have FORCEALLYCOLLISION enabled.
Don't push allies	sv_DontPushAllies	4194304	Prevents a player's attacks from thrusting their teammates and friendly monsters. This also prevents teammates from being pushed by barrel explosions caused by the player. This is ignored by actors who have FORCEALLYCOLLISION enabled.
Don't keep join queue	sv_DontKeepJoinQueue	8388608	(development version 3.2-alpha and above only) When enabled, the join queue will be cleared between levels. This was the default behaviour for non-duel modes prior to 3.2.
Don't hide stats	sv_DontHideStats	16777216	(development version 3.2-alpha and above only) Allows players to see the health and armour of other players in competitive game modes.
Don't override player colors	sv_DontOverridePlayerColors	33554432	(development version 3.2-alpha and above only) Prevents players from overriding player colors via the 'cl_overrideplayercolors' CVar.

CompatFlags

Flag Name	Console shortcut	Value	Description
Find shortest textures like Doom	Compat_ShortTex	1	In Doom, AASHITTY in Doom II or AASTINKY in Doom was created to fill in the place of texture index 0, normally treated by the Doom engine as no texture at all. When this is enabled, the "raise platform by lower texture" line special and MAP07 floor raise considers AASHITTY or AASTINKY as a valid texture and uses it's height when raising a platform. If disabled, these textures aren't considered valid and are ignored.
Use buggier stair building	Compat_Stairs	2	Causes doom to calculate heights of stairs when stairbuilding from the last (topmost) step, instead of the first (bottom-most) step.
Limit pain elementals to 20 lost souls	Compat_LimitPain	4	Prevents pain elementals from spawning lost souls if there are 20 or more on the map.
Don't let others hear pickups	Compat_SilentPickUp	8	This prevents players from hearing other players picking up items, weapons, or powerups in netgames.
Actors are infinitely tall	Compat_NoPassOver	16	This causes all objects to occupy an infinite vertical space from the ceiling to the floor, which prevents monsters or the player from being able to pass over or under other solid objects, regardless of whether they are touching each other on the Z plane or not. WARNING: Enabling this will break ZDoom-style thing bridges and objects that rely on height sensitivity.
Allow silent BFG trick	Compat_SoundSlots	32	Forces all actors to play all sounds only on one channel, cutting off any previous sounds the actor has made. Only enable this if you can't live without the silent BFG trick, as it will cripple the sound system and prevent actors from playing any more than one sound at a time.
Enable wallrunning	Compat_WallRun	64	This uses a buggier method of collision detection with walls that allows a player to run double average speed when pressing against a vertically-aligned wall.
Spawn item drops on the floor	Compat_NoTossDrops	128	Items dropped by monsters appear on the floor below the center of the monster, instead of being tossed from the monster's corpse. May cause items to get stuck in walls or appear at the bottom of pits.
All special lines can block use lines	Compat_UseBlocking	256	Any lines with line specials prevent the player from triggering a usable line behind it, regardless of whether the frontmost line can be used itself or not.
Disable Boom door light effect	Compat_NoDoorLight	512	Don't do the BOOM local door light effect
Raven's scrollers use original speed	Compat_RavenScroll	1024	Raven's scrollers use their original carrying speed
Use sector based sound target code	Compat_SoundTarget	2048	Use sector based sound target code.
Limit deh.MaxHealth to health bonus	Compat_DehHealth	4096	Players can not exceed over the 200% health, as you can with just the normal MaxHealth bonuses.
Trace ign. lines w. s. sec on b. sides	Compat_Trace	8192	Trace ignores lines with the same sector on both sides
No monster dropoff move	Compat_Dropoff	16384	Monsters cannot move when hanging over a dropoff
Scrolling sectors are additve	Compat_BoomScroll	32768	Scrolling sectors are additive like in Boom
Monsters see semi-invisible players	Compat_Invisibility	65536	Monsters will be able to see the player even if the player has a partial invisibility sphere.
Silent instant floors	Compat_SilentInstantFloors	131072	Instantly moving floors are not silent
Sector sounds	Compat_SectorSounds	262144	Sector sounds use original method for sound origin.
Doom missile clip	Compat_MissileClip	524288	Use original Doom heights for clipping against projectiles
Monster drop off	Compat_CrossDropoff	1048576	Monsters can't be pushed over dropoffs
Allow any bossdeath for level special	Compat_AnyBossDeath	2097152	If enabled, any actor type which calls A_BossDeath triggers the level's special, even if they are not supposed to. This emulates a pre-Doom v1.9 behavior which is exploited by Doomsday of UAC.
No Minotaur floor flames in water	Compat_Minotaur	4194304	If enabled, maulotaurs are unable to create their floor fire attack if their feet are clipped by water, sludge, lava or other terrain effect. Note that the flames can still travel across water; this was on the part of Raven Software's developers as it was a bug found in the original clipping code and not an attempt at realism as some may have believed.
Original A_Mushroom speed in DEH mods	Compat_Mushroom	8388608	If enabled, when the A_Mushroom codepointer is called from a state that was modified by a DeHackEd lump, it uses the original MBF behavior of the codepointer. This option does not affect states defined in DECORATE.
Monster movement is affected by effects	Compat_MBFMonsterMove	16777216	If enabled, monsters are affected by sector friction, wind and pusher/puller effects, as they are in MBF. By default, monsters are not subjected to friction and only affected by wind and pushers/pullers if they have the WINDTHRUST flag.
Crushed monsters can be resurrected	Compat_CorpseGibs	33554432	If enabled, corpses under a vertical door or crusher are changed into gibs, rather than replaced by a different actor, if they do not have a custom Crush state. This allows an arch-vile or similar monster to resurrect them. By default, actors without a custom Crush state are removed entirely and can therefore not be raised from the dead.
Friendly monsters aren't blocked	Compat_NoBlockFriends	67108864	If enabled, friendly monsters are, like in MBF, not affected by lines with the "block monsters" flag, allowing them to follow the player all around a map. This option does not, however, block them at lines with the "block player" flag.
Invert sprite sorting	Compat_SpriteSort	134217728	If enabled, the original Doom sorting order for overlapping sprites is used.
Use Doom code for hitscan checks	Compat_Hitscan	268435456	If enabled, the original Doom code for hitscan attacks is used. This reintroduces two bugs which makes hitscan attacks less likely to hit. The first is that it is a monster's cross-section, rather than its bounding box, that is used to check for impact; this makes attacks with a limited range (especially melee attacks) unlikely to hit very wide monsters. The second is the blockmap bug: if an actor crosses block boundaries and its center is in a different block than the one in which the impact happens, then there is no collision at all, letting attacks pass through it harmlessly.
Find neighboring light like Doom	Compat_Light	536870912	If enabled, when a light level changes to the highest light level found in neighboring sectors, the search is made only for the first tagged sector, like in Doom.
Draw polyobjects like Hexen	Compat_Polyobj	1073741824	Uses the old flawed polyobject system, for maps that relied on its glitches.
Ignore Y offsets on masked midtextures	Compat_MaskedMidTex	-2147483648	This option emulates a vanilla renderer glitch by ignoring the Y locations of patches drawn on two-sided midtextures and instead always drawing them at the top of the texture.

CompatFlags2

Flag Name	Console shortcut	Value	Description
Cannot travel straight NSEW	Compat_BadAngles	1	This option emulates the error in the original engine's sine table by offsetting player angle when spawning or teleporting by one fineangle (approximatively 0.044°), preventing the player from facing directly in a cardinal direction.
Use Doom's floor motion behavior	Compat_FloorMove	2	This option undoes a Boom fix to floor movement logic. If this option is on, a floor may rise through the ceiling, or a ceiling may lower through a floor.
Non-blocking lines can be pushed	Compat_PushWindow	64	For maps that expect non-blocking push lines to activate when you are standing on them and run into a completely different line. (for example, Thing Thrust Z ladders)

ZaCompatFlags

Flag Name	Console shortcut	Value	Description
Client side scripts (NET)	Compat_NetScriptsAreClientSide	1	Uses Skulltag's old behavior when (NET) ACS Scripts are used. This is disabled by default, for compatibility among other ZDoom wads. If the WAD file is designed for Skulltag, and uses NET script advantages, then you would enable this feature.
Clients send full button info	Compat_ClientsSendFullButtonInfo	2	This needs to be enabled to make the ACS function {{{2}}} work on server side scripts with buttons other than BT_ATTACK BT_USE BT_JUMP BT_CROUCH BT_TURN180 BT_ALTATTACK BT_RELOAD BT_ZOOM Because it increases net traffic, it should only be activated if needed.
No land	Compat_NoLand	4	If this is enabled, players are not allowed to use the land CCMD.
Old random generator	Compat_OldRandom	8	If this is enabled, the original Doom random table is used to generate random integers in [0,255], which should make for instance the SSG cause a little more damage.
NOGRAVITY spheres	Compat_NoGravity_Spheres	16	This compatflag gives the specified spheres the NOGRAVITY flag, but only when they are spawned by the map. Invulnerability Sphere Mega Sphere Soul Sphere Blur Sphere
Don't stop player scripts on disconnect	Compat_Dont_Stop_Player_Scripts_On_Disconnect	32	If this is enabled, the ACS scripts with a player as activator are not terminated when this player disconnects.
Old explosion thrust	Compat_ExplosionThrust	64	Enables the original (greater) horizontal explosion thrust.
Old bridge drops	Compat_BridgeDrops	128	If this is enabled, non-SOLID things (like flags) fall through invisible bridges.
Old jump physics	Compat_OldZDoomZMovement	256	Enables the old ZDoom 1.23b33 jump physics.
No weapon switch cancellation	Compat_FullWeaponLower	512	This flag disallows the ability to switch weapons while in the middle of {{{2}}}. Once the selected weapon starts its raising sequence, it cannot be cancelled.
Auto-aiming has vertical holes	Compat_Autoaim	1024	Zandronum uses more tracers in order to fill in the vertical gaps of the autoaim, this reverts it back to vanilla Doom's three-tracer behavior.
West-facing spawns are silent	Compat_SilentWestSpawns	2048	When set to true, players who spawn facing west are silent, as in vanilla Doom.
Use old Skulltag jumping behavior	Compat_SkulltagJumping	4096	Restore the jumping behavior known from Skulltag. This reverts the jumping change from ZDoom SVN revision 2970.
Reset Global ACS variables upon map reset	Compat_ResetGlobalVarsOnMapReset	8192	When set to true, any world or global-scope ACS variables/arrays will be reset upon resetting the map like in Survival.
No obituaries	Compat_NoObituaries	16384	When set to true, obituary messages will not be printed if a player dies.
Limited movement in the air	Compat_Limited_AirMovement	131072	By default, Zandronum gives players more maneuverability in the air than ZDoom. When this is true, ZDoom’s method is used. See Air Control for more precise details.
Plasma bump bug	Compat_PlasmaBump	262144	Allows players to pick up items on the other side of solid walls by running into the wall at a specific angle. This flag should only be used for old vanilla Doom maps that really need it; it can have serious side effects on bridges and scrolling floors!
Allow instant respawn	Compat_InstantRespawn	524288	Allows players to respawn instantly after being killed by holding down the "use" key when being hit.
Disable taunts	Compat_DisableTaunts	1048576	Prevents players from using the "taunt" command.
Original sound curve	Compat_OriginalSoundCurve	2097152	Enabling this uses the original Doom sound curve, which causes sounds to fade away at a shorter distance. When disabled, the Hexen sound curve is used instead, which allows players to hear sounds louder, farther away than usual.
Use old intermission screens/music	Compat_OldIntermission	4194304	Use doom2.exe's original intermission screens/music.
Disable stealth monsters	Compat_DisableStealthMonsters	8388608	Disable stealth monsters, since doom2.exe didn't have them.
Old radius damage	Compat_OldRadiusDmg	16777216	If this is enabled, the original Doom radius damage code is used, i.e. explosions have infinite vertical range.
Disable crosshair	Compat_NoCrossHair	33554432	Players will not be able to use crosshair.
Old weapon switch	Compat_OldWeaponSwitch	67108864	Players will be forced to switch weapons every time they pick up a new weapon.

Related Pages

• Server Variables
• Console Variables
• Console Commands
• LMSFlags