Left 4 Dead 2 [Steam store page]
Even though Killing Floor doesn't have a story line I still prefer it for co-op fun. This is incredibly easy, and the scripted way the special zombies pop out next to you is annoying unless you have the maps memorized.

Killing Floor [Steam store page]
The graphics are a bit rough but this game is all about speed and accuracy killing waves of experimental creatures. Forget story, the co-op is loads of fun with a group of friends, and fairly challenging as well.

The most difficult part is the way enemies rubberband - if you run full tilt on many maps, and turn around they'll still be very close behind you - rounding the nearest corner or doorway. The spawn locations also don't seem to be set specifically - they seem to appear directly around any corner that you haven't looked around in the last few seconds, or further ahead if you're running rather than camping. On some areas in maps they also drop down from above, off buildings or through holes in the roof.

These mechanics aren't necessarily flaws - they make the game much more fast paced and difficult than it would be if you could kite them more strategically. Kiting is still very much possible because the game limits the number of enemies on the map at any time - so if you can group them all behind you then they will slowly appear in front of you as you kill ones behind.

Team Fortress 2 [Steam store page]
I wanted to love this game, but found it hard to get into because it requires team effort (mainly a healer at your back) or you die exceptionally fast. Unlike Unreal Tournament or Counter-Strike: Source where you can easily play a quick lone wolf match

Atom Zombie Smasher [Steam store page]
Fairly easy on default, yet nearly impossible to win without using the chooser or combatant modifier - since it often gives you a poor selection of mercenaries. The balance could use a bit of work, since chooser lets you faceroll - but overall fun.

Just Cause 2 [Steam store page]
Something for everyone - a sandbox with over the top violence and stunts, plenty of collectables, challenges, and a story line that appears just often enough to keep you interested in the missions. Steal helicopters and parachute from planes...

Grand Theft Auto III [Steam store page]
The first 3D third person sandbox game in the series. Unfortunately only a hint of a story, so after a few minutes roaming around and a couple missions it lost my interest. I found Just Cause 2 to be a much more compelling sandbox game

The character creation sequence is creepy and combat is painful compared to real FPS. It suffers from lack of direction after you leave the vault, much like the The Elder Scrolls IV: Oblivion series. The world is nicely detailed - but this can't rescue the game

Extremely inaccurate guns - worse than Counter Strike: Source - which makes it nearly impossible to kill anything at range without several clips of ammo. At close range it takes 2-3 head-shots from 4ft away, which is ridiculously bad. Decent story though.

Counter-Strike: Source [Steam store page]
More realistic and slower paced than some other shooters. The guns also tend to be less accurate than your normal video game for realism, and shooting while you run is nearly impossible. Still, a reasonably fun multi-player FPS.

S.T.A.L.K.E.R.: Shadow of Chernobyl [Steam store page]
It has potential, but feels like a game that hasn't yet been play-tested. There is a general lack of instruction about controls and the little that is given is as entertaining as reading a manual.

The open world seems interesting at first, but your character gets exhausted quickly and soon you're trudging at a snails pace across the vast terrain. The pistol you've been equipped with has terrible accuracy, and to hit anything you need to be right on top of it. This is an impossible feat when your opponents have assault rifles and your character dies with a couple bullets.

Twenty quicksave/loads later you've finally been lucky enough to run up and shoot your opponent in the face before he can reload. Yet the gun you just picked up wasn't automatically equipped, and as you switch to the unweildy menu to activate it the game doesn't pause and you are mowed down once again. Eventually you survive and get it equipped, but you have to press the reload key to actually load the gun.

Now due to invisible areas apparently high in radiation one of the missions in the starting zone seems impossible to reach, much less complete. Not to mention that once you have slight radiation poisoning you might as well just reload a quicksave instead of wasting large amounts of vodka and bandages.

The AI itself is decent and manages to put up a fight while not being godlike - though it does cheat by omnisciently knowing your location. AI enemies only show up on the map temporarily after they shoot, like Tom Clancy's Ghost Recon, which puts you at a bit of a disadvantage. Bushes can also be annoying - not obscuring your location to the AI, yet making it hard to aim.

It's a pity they didn't actually play their own game. It could have been fun, but there are just too many rough spots to make it worth struggling through as-is. Realism is fine, but not when it interferes with the game being fun/entertaining.

This is a fun but easy Diablo style dungeon crawler. It features quick travel via portals and spells, as well as a pet to sell items while you continue killing. Additionally there is a shared chest to transfer valuable items between characters

Deus Ex: Game of the Year Edition [Steam store page]
One of the best FPS I've ever played - fantastic story and detail. Each play-through you'll find new areas, people, and story that you missed before. Highly recommended