You can't, say, finish the game on Hurt Me Plenty and then play through on Nightmare with all of the weapons found and upgraded. In order to play the game on Nightmare difficulty, you must start a fresh game on that difficulty and you can't change it back. Just a level select screen for replaying levels for missed secrets and stuff. In any case, the game never calls any of it New Game + and I can see why someone might call it that, but I don't personally think it feels like a New Game +. I don't know if you lose your checkpoint. You can also go into Mission Select at any time - this isn't a feature that unlocks after finishing the game, if you want to start a mission you've already finished at any point in the game, you can. You can switch between any of the lower three difficulties at will. Instead, you can pick each level individually and play it with all of the challenges already done and secrets already found and all your upgrades still intact, etc, and when you finish the level, you go back to the level select screen instead of continuing into the next level. E4M9, Fear: Find the secret exit in E4M2, Perfect Hatred. E3M9, Warrens: Find the secret exit in E3M6, Mt. (The secret exit is located across the pit of slime near the entrance of the level.) E2M9, Fortress of Mystery: Find the secret exit in E2M5, Command Center. This is just a step-by-step walkthrough to help you finish each level. Find secret exit in E1M3, Toxin Refinery. The secrets aren't listed and neither are the monsters. There isn't a New Game + in the traditional sense of 'completely restart the game with everything intact but all the secrets and stuff unfound and the levels unlocked'. Doom Solution by AMC () Version 2.5 Written on 11/3/02 This is the full solution to both the Original and Ultimate Doom(TM). I should clarify this more since I'm at a computer and not on a phone now. Aha, so it's the 'Resident Evil 4 NG+' variant then.

Doom 4 level 1 secrets