Crusader was an AMAZING series in the mid 90's for the PC and some other advanced systems, like the sage Saturn, and PlayStation. There were two games: No:Remorse and No:Regret both games have great controls and are loaded with Easter-eggs to hunt down.

When I read the topic these were the only games that stood out in my mind. While they do get a bit repetitive, it is outstanding work.

http://www.youtube.com/watch?v=dX4daAHwXiE&feature=related

http://www.youtube.com/watch?v=9q5_vWByoNs&feature=related