Renegade Ops

If you've ever played Smash TV or that special zombie mode in black ops, you've played this. It's a top down shooter where anything you point at dies. You control a tank or car as you drive through the level completing timed objectives. You have infinite ammo with your basic machine gun, and then you can pick up things like a flamethrower, railgun, or rockets. I really like it. Once you get used to driving and shooting at the same time, this game is really good. It's simple and fun.

Just be sure to have a controller on hand. You won't get far using a keyboard.

Saints Row: The Third

I have never played the previous one, which everyone says is superior, but Saints Row the Third on it's own is an amazing game. The storyline actually kept me interested, even if some plot points were shoehorned in, and the sandbox is like GTA 4 on acid. There are a bunch of customization options for your character, your car, and your strongholds. You can upgrade your dude/dudette to have infinite ammo and take no damage from things, but please don't. 

Once I made it so that I couldn't be hurt at all I instantly regretted it because I felt I had no point in continuing to play. I'll prolly make another character again, lol. Get the game. It's great.

Dragon Age: Origins

Dragon Age: Origins is my kind of game. An egregiously long fantasy RPG game. Fully completing the game would take you about 5 years and a half a day, and that's if you skip the dialogue. All the combat and exploring works just like you'd expect it. My biggest gripe with the is the camera. It's controlled with the right mouse button, the same button used to attack and interact with things. The tactical view is horrible and useless, and the game doesn't even register my mouse wheel's movements. I'd rather play the game from the viewpoint of Dungeon Siege rather than Diablo, anyway, so it didn't matter as much. It's just a bit weird I didn't even have a choice.

My second play through has made it easier to advance, now that I know what I'm doing. I'm not sure how Dragon Age 2 will fair, but the 30 hour adventure I had in Dragon Age: Origins has set itself in stone as one of the best RPGs I've ever played. Maybe it'll be one of the best RPG series I've ever played.

Psychonauts

Psychonauts is a trippy and fun game. There are so many different environments you will encounter through the game, and all of them great. No multiplayer and no side-missions makes this game suffer in the replay department, but the single player is too good to pass up. It's colorful, unique, and a breath of fresh air from the many 'gritty' and 'realistic' games. From taming a wild bull to stomping around a city populated by fish, this game is great.

Battlefield 2

One of the best games of yesteryear, Battlefield 2 is amazing. A few years may have outdated the graphics by some standards, but the gameplay is still there. Lack of single player may be a downer, but multiplayer is still going. It may not be on its last limbs yet but its time is coming. Until then, this game is great fun, and cheap too.

Battlefield: Bad Company 2

While the Single Player may not be all too gob-smackingly great, the multiplayer is enough to hold it up. BFBC2 continues the tradition of intelligently including vehicles in their multiplayer maps. Who doesn't want to fly around in a helicopter killing people? With DLC, map packs, and a huge user base, BFBC2 is a good buy. Until the multiplayer support runs out that is.