Debug Cheat Menu
-I used this mainly for raising the difficulty midway. You can't change it after starting a game and since "Hard" becomes too easy when you upgrade everything as intended (especially health), this is a good way to make it more challenging again.
Sadly you can't undo your upgrades with the debug menu, so I would advice to not upgrade your health at all to make the game realistically difficult from start to finish (At least thats what I would do If I would play it again).

Multiple Difficulty Rebalances
-If you play on higher difficulties than "Hard", enemies become quite bullet spongy. With this you can raise your own damage and the damage by enemies to make it more realistic. Can also be used to change item and ammo drop rates.

Darker Nights
-default nights are pretty bright. This makes it more immersive with as dark nights as you like.

Better Flashlight
-makes the flashlight brighter. This is mandatory if you use the previous mod, since it also lowers the flashlight exposure.