Walkthrough of Hell: Level 20 of Doom 3

Grab the pick ups around you then cross the bridge ahead and climb the stairs.

Stand in the green beam and you’ll be sucked up; a cage forms around you and then it drops to the ground and breaks leaving you surrounded by enemies. Kill the imps surrounding you but be careful not to fall off the edge. When they’re done you’ll see a bridge forming, cross it and head into the passage - grab the ammo on your right.

A hellknight will emerge as the wall parts; kill him then head down the right passage and kill a cherub and an imp. Grab a medkit and some more shells. Head back and take the left passage. There’s another two cherubs and some armor and more shells.

Now go back and grab the chainsaw from the right hand side of the door that the hellknight came through, and then proceed through it. On the left you’ll find a chaingun, while on the right two imps will spawn in, followed by some lost souls.

Continue on and carefully jump across the stepping stones. Enter the doorway on your left and grab the medkit.

There are two lost souls ahead and then a hellknight spawns in behind you, followed by an imp in an alcove. Enter the alcove after you kill him for more pick ups then kill two more imps and the bars will recede into the floor.

Head in and kill the cherubs that spawn, followed by a mancubus. When the mancubus is down head through for some pick ups and a plasma gun. Make sure you grab the pick ups first because when you get the gun the floor will collapse.

At the bottom grab the beserker helmet and run around pulping the various imps and the hellknight that spawn in with the chainsaw. When they’re done grab the pick ups scattered around and proceed along the corridor. You’ll find Simon Garlick’s PDA and some goodies including a rocket launcher.

Head through the doors once you have everything.