Giants citizen kabuto - a funny FPS and you can fly with a jetpack! Its control is really easy too, helicopters the same way, i only wish helicopters in GTA or any other game were as easy as they are in this to control. Multiplayer on gamespy was a blast too, dunno if theres still a community there or not though.
Chronicles of riddick escape from butcher bay - another FPS, its really good, massive variety in level types and enemy types, your in a prison a massive high security prison, but theres mutants and aliens that fit into it, robot mechs too. One really big mech called the heavy guard too, its awsome. You also get to interact with the prisoners, kill them if you want, complete missions as well as advance the main story, has a stealth element too. I expected it to be like F.E.A.R since the setting is in a prison, and F.E.A.R's setting is some water facility or warehouse etc for the most part, but the variety in levels within riddick and variety in enemies really surprised me. Even some enemies such as the riot guard come back later with dual gatling cannons attached, theres also a few different varieties of riot guard, i counted 4. You get to command some of these riot suits too
Its a very good FPS with a fun storyline. Riddicks lines are great too "its not the fall that gets you.... its the sudden stop at the bottom" Good stuff!
Soldiers: Heroes of WWII - This game is amazing, the engine is awsome, the gameplay is better. Its got similarities to commandos, but the game is very open ended, also things can change quickly. I nearly won a mission by protecting an officer, i fought off the panzers and a panther, but my tank died and my AT gun was out of ammo. So i was done, then a tiger rolls onto the maps and proceeds towards the officers hideout, i found a repair kit inside one of the broken german tanks, the panther blew up entirely so i repaired a panzer IV before the tiger got close and ambushed it from behind. Vehicles play a big part in this game if you want them too. They can be very useful. Very good game.