hercufles: how is that game btw i sadly missed that game in its time never could run it well.
Crusader? Fun! Simple, almost nonexistant story, lots of guns, enemies, destructable enviros, lots of secrets, different paths through levels. Beside the controls, that not everyone might like [i kinda fell in love with them, especially No Remorse (hence my avatar)], but once You get a hang of it, and You know that Caps lock is for autorun, and numlock changes the way turning works, it's bloody amazing. The animations are a bit wonky, especially when jumping, saving before doing those is very wise.;)
It fits the "i want old school action, if i want a story.." bill perfectly. ;)
If You're referring to Deus Ex though, i couldn't tell, i got around the first game pretty late, and couldn't really enjoy the uglyness of the beast. But the new one seems pretty effin' awesome.
[edit]
Ninja'd by Vagabond's reputation. AGAIN. ;D