Star Wars: Dark Forces 1.0
Star Wars: Dark Forces reminds me a lot of Quake, with less bloodshed.
In this game are you basically given quests to fulfill, but you need to find little gadgets throughout the game to do it. For instance, if you want to get through a door in the beginning, you need to acquire the red key.
There are guards, monsters and little robotic creations that you will encounter on your endeavor. Good luck: And may the force be with you.