• -dm3 specifies the Deathmatch 3.0 rules (weapons stay, items respawn) for netgames (since 4.1).
• -episode 1 launches Hell on Earth if the Doom 2 IWAD shipped with the Doom3: BFG Edition is used
• -episode 2 launches No Rest for the Living episode if the Doom 2 IWAD shipped with the Doom 3: BFG Edition is used.
• -warp 1a warps to the secret level E1M10: Sewers of XBox Doom IWAD (since 2.3).
• -mergedump <file> merges the PWAD file(s) given on the command line with the IWAD file and writes the resulting data into the file given as argument. May be considered as a replacement for the DEUSF.EXE tool (since 2.3).
• -lumpdump dumps raw content of a lump into a file (since 5.7).
• -blockmap forces a (re-)building of the BLOCKMAP lumps for loaded maps (since 2.3).
• -playdemo demoname -warp N plays back fast-forward up to the requested map (since 3.0).
• -loadgame N -record demoname and -loadgame N -playdemo demoname allow to record and play demos starting from a savegame instead of the level start (since 4.0).
• -playdemo demoname1 -record demoname2 plays back fast-forward until the end of demoname1 and continues recording as demoname2 (new in 5.5).
• -fliplevels loads mirrored versions of the maps (this was the default on April 1st up to version 5.0).
• -flipweapons flips the player's weapons (new in 5.3).
• -levelstat prints a levelstat.txt file with statistics for each completed level (new in 5.9.0).
• -pistolstart reset health, armor and inventory at start of each level in Doom (new in 5.9.2)
• -wandstart reset health, armor and inventory at start of each level in Heretic (new in 5.9.2)
• -doubleammo doubles ammo pickup rate in Doom and Strife (new in 5.11).
• -moreammo increases ammo pickup rate by 50% in Heretic (new in 5.11).
• -moremana increases mana pickup rate by 50% in Hexen (new in 5.11).
• -fast enables fast monsters in Heretic and Hexen (new in 5.11).
• -autohealth enables automatic use of Quartz flasks and Mystic urns in Heretic and Hexen (new in 5.11).
• -keysloc enables display of keys on the automap in Heretic (new in 5.11).
• -nosideload disables automatic loading of Master Levels, No Rest for the Living or Sigil (new in 5.11).
• -nodehlump disables automatic loading of embedded DEHACKED lumps in wads.