Thread:Le Rottweiler/@comment-1496755-20150728154119/@comment-1496755-20150805081745

Yeah, this is like playing Doom or Quake without ever picking up powerups. Heretic's inventory items play the same role, except that they are activated when you choose to.

Hexen adds some a few more items, the most interesting of which is the Flechette because it has a different effect in the hands of the different character classes (it could act as a grenade, a toxic gas bomb, or a time bomb). There are other surprises as well, which will remain hidden for now...

Quake 2 uses a similar system too - when you pick up a powerup, you can activate it whenever you plase. However, you can only carry one, so you can't get another Quad Damage or Invulnerability until you've used the one you already have.