Instantly jump to a specific map (e.g., IDCLEV07 for Map 07).
Cheat codes are entered directly through the keyboard during gameplay (outside of the Automap menu). God Mode (Invulnerability). IDKFA: Provides all weapons, full ammo, and all keys. IDCLIP: Allows you to walk through walls (No-clip).
Avoid picking up ammo boxes if you are near maximum capacity to save them for later. For weaker enemies like Imps or Zombies, use the Chainsaw or Berserk-powered fists to preserve shells.
Save ammo by tricking enemies into attacking each other. If a demon is hit by a projectile from another species, they will often turn and fight each other.
Doom II: Nightmare! 100% Secrets + Items - Part 2 (MAP17 - MAP30)
Grants specific power-ups: S for Berserk, V for Invulnerability, R for Radiation Suit, and I for Invisibility. Strategic Combat Tips
It is arguably the most efficient weapon for mid-tier demons like Hell Knights and Revenants.