Richleader is on the ball-- Operation Flashpoint has my vote for best sp game. And the multiplayer is great, too. I regularly play with 4 other people, and it's fantastic. The game is so immersive! You have the freedom to go ANYwhere using ANY available mode of transprtation (stealing a civilian's car sure beats walking/running several kilometers), and you HAVE to use coverand concealment to stay alive. The islands are HUUUUGE, and there is SO much variety in the game. There are random elements that keep the missions challenging (they are programmed that way by the mission author) And then, just when you get proficient as a infantry guy, you start playing other roles, like tank commander, Helo pilot, A-10 pilot, SF guy, prisoner of war/escapee, as well as commanding units of infantry, armor, etc. You can make your own missions using the editor, too.
As a servicemember, this is definitely my favorite game. I lose track of time even worse than I do when playing Civilization 3.
Also, the AI is outstanding, the few remaining bugs are *very* minor (it's up to 1.42 now), and there are a lot of people making addons and missions, and even additional campaigns. I now have winter and jungle environments, complete with appropriate uniforms (the tigerstripes and NVA black pajamas/sandals are especially cool) and skins for vehicles. The weapons handle very well. I guess I could go on and on about this game.
Oh, and if you hear people griping about the graphics--- forget it-- yes, the trees kinda suck when you're right on top of one, but everything else MORE than makes up for that.
check out
www.flashpoint1985.com and read the reviews. I can't wait to see what Codemasters and Bohemia Studios come up with next!!