First of all, I wasn't sure if this game is purposely over-the-top or if it's taking itself seriously up until the credits, where a rap compilation of the main character's swear words starts playing and I really can't see how this isn't a joke by the developers. Playing this still made me chuckle quite a few times just because of how absurd some moments were, especially dialogue.
The story is super simple:
You play as Richard Marcinko (he is, apparently, a real NAVY Seal and this game is kind of "based" on his book of the same name)
Richard is sent on a mission with his two fellow soldiers, who both die in the same cutscene we first see them in. So, understandably, Marcinko is mad and the rest of the game is just, as the protagonist himself describes it: "Payback". Said "Payback" involves killing what's probably a good chunk of North Korean and later, Russian soldiers.
Graphics are meh. It doesn't look too bad, but it doesn't exactly look good either.
The gameplay is pretty generic. It has a similar cover system to Rainbow Six: Vegas 1 and 2. Weapons aren't really satisfying or exceptionally well animated, which isn't good considering it's a shooter. The only notable thing is the stealth "system", yes, with the "". So this "system" seems to be solely based on the line of sight, you can walk up to enemies from behind, you can even run, they don't care, and perform "takedowns", which are basically just short cutscenes of the protagonist violently murdering someone by stabbing them several times or throwing them off ledges while they scream in agony, but no one around them seems to care. Those "takedowns" can also be performed after being spotted or even shot at, but during the animation you can't receive damage, so bullets just kind of fly through Richard like if he was a ghost.
The part that makes this game so entertaining is the dialogue. The main character (voiced by Mickey Rourke, by the way) does NOT shut up. He constantly drops the F-bomb while fighting or communicating through radio, insulting the enemies in the most absurd ways, I probably can't write them here, but check the "quotes" section, you'll get the general idea. The stuff this guy says is the main reason why this game is so funny and probably the only reason why I kept playing this game despite it being pretty boring in terms of gameplay.
Alright, so we have a pretty generic shooter with repetitive gameplay, meh graphics and absurd dialogue.
Is this game good? Nah, not really.
Is it worth playing? I'd say yes. You can get it really cheap and it's only around 2 hours long, so I recommend you to bring a friend and just have fun with this game for an evening.