Muckelchen's Old School FPS Collection

Just to give you a collection of decent to great Old School FPS games played by me.

Just a little explanation what Old School FPS means to me:
(Of course not all of these points have to be fulfilled.)
-singleplayer only
-focus on gameplay
-mission/level based
-a lot of enemies
-usually the character is way stronger than the enemies (if played correctly)
-secrets
-no hp-regeneration, usually also an armor system
-managing ammo and health items (and armor if existent)
-you can carry all found weapons at once
-different weapons use different ammo types
-different enemy types
-quick saves and quick loades
-no rpg or rogue-like ♥♥♥♥♥