I just played through Medal of Honor: Frontline for the GameCube... It was a lot of fun, to my suprise. I had a few complaints about it, but, you know how that goes... a 'frontline' battlefield game wherein you are really only a member of the frontline combat for one mission, and then become a spy.
It should be noted that I hate, HATE HATE HATE HATE HATE the Gamecube controller - and what's the deal with using the super-stiff C-stick as the default aiming mechanism. I died a number of times because I couldn't aim at a target directly in front of me. Nintendo needs to somehow develop an adapter so you can use N64 controllers for the GC... seriously...
Now, I don't want to ruin things for anyone, so I'm going to talk in really shady generalizations, but maybe beware of
spoilers in the following just to be safe. The ending kindof sucked. The thing that really amused me was the notion of realism: they seemed to try really hard to make a feasible storyline and game with real WWII technology and scenarios and stuff, but then they go and make it so that bullets do 1/8th the damage of a punch or pistol whip. There were instances where I was being mobbed by Germans, and it was actually more effective to just hit people with my gun until they died rather than reloading my automatic. I killed what I suppose you'd have to call 'the boss' of the game (though he really wasn't in any conventional sense a super-tough boss type character as much as he was just another soldier) by pistol whipping him to death. He didn't really even manage to hit me, he shot at me and I ran around like a baffoon dodging bullets, and then I just rushed him while he reloaded his gun and I beat him to death with my gun. That last fight really disappointed me, to be honest. The last set of missions leading up to this one were insanely hard compared to the rest of the game, and even the start to that level had me replaying the first part half a dozen times to get past all the guys with rocket launchers and such... but then to be able to whack the guy 3 or 4 times with a gun and watch the ending? Ehhh... Not thrilled. If you have the chance, though, play through the game. There's some great gameplay to be had despite some of the drawbacks.
Have yet to try multiplayer though, so we'll see how that one turns out.