Doom the Roguelike/YMMV

• Breather Level: The Chained Court, Hell's Armory, and any level that spawns demons and gives you clear line of sight (as long as you're not playing in a melee challenge).
  • As of 0.9.9.2, the Chained Court is no longer a Breather Level if you clear Hell's Arena first, and Hell's Armory has a fairly nasty Bonus Boss which you need to kill in order to get the maximum reward.
• Demonic Spiders: Archviles. Also Revenants(they never miss, and deal splash damage that will destroy items near you) and Mancubi(they have utterly horrible accuracy, but if you run into one while near a wall, you can easily be bounced off of all of their shots, killing you in one attack if you're not almost full on health).
  • Ironically enough, Arachnotrons hardly count, being only fast, hard-hitting, and tough.
    • Getting caught in the open by them, a group in particular, can still make them seem that way. Unless you've got traits and armor suited for maximum dodging of plasma spam, that is.
• Game Breaker: The Ammochain master trait gives you infinite ammo for rapid fire weapons, letting you spray plasma fire everywhere just in case there might be an enemy past your range of vision. Only limited by the fact that rapid fire weapons aren't all that useful unless you either have the Eagle Eye trait(which you can't get if you want Ammochain), or agility mods(which are rare random drops).
  • Not simply infinite ammo, but never having to reload at all, and freeing up a massive amount of inventory space that would otherwise be reserved for bullets. Never reloading means you are never really vulnerable, and being able to carry more armor and medkits than any other build pretty much guarantees ammochain builds are the most effective.
    • Ammochain was nerfed in 0.9.9.4. Now it uses one ammo. Per burst. It wasn't that much of a nerf, but you can't constantly spam a High Power Plasma Rifle without some backup power cells.
      • But you can do that with a High Power Nuclear Plasma Rifle
  • Mods are much more common as of the newest version, which predictably makes Ammochain more powerful. This change seems to affect other weapons just as much, however.
  • Forget Ammochain! With version 0.9.9.2 out, you can use three bulk mods, the nano pack, and both levels of the Whizkid advanced trait to make any of your weapons have infinite ammo! We repeat, you can make any of your weapons have infinite ammo forever. Now, think about it for a moment. Still don't get it? Here's a hint, taken from the wiki: Infinite BFG. Every turn. Forever. Just slap the mods in and you can spam the fucking thing while laughing your ass off at anything that dares to exert opposition.
    • This is hardly a game breaker, however, due to the ludicrous scarcity of the Nano pack.
  • Tacking the Sniper mod onto a Plasma Rifle - especially if you have Ammochain - can make a good portion of the game a cakewalk. Guaranteed hits with a weapon that is only balanced by its sheer inaccuracy makes for piles upon piles of dead Barons of Hell. In addition to this, you can simply fire blind and be guaranteed to kill something if there is, indeed, something in the way of your firing line.
• Good Bad Bugs: In the Angel of Marksmanship or Shotgunnery challenges, you can't use any weapons except pistols or shotguns, respectively, but can still attack with the Emergency Weapon of your fists. In some versions, when you attack with a melee weapon wielded, it will cancel the attack and the use of time it would have taken, then go ahead and punch the monster anyway. You could kill anything by revving up a chainsaw and then punching them a few dozen times in an instant.