Beat Hazard [Steam store page]
An interesting mix of music and gaming - enemies generated by songs. Disappointing that they charge extra for multiplayer (DLC - BH Ultra).

Trine 2: Complete Story [Steam store page]
I didn't enjoy this nearly as much as Trine - it felt like less of a puzzle game and a lot more platformer. The wizard's triangle is gone, and all the characters swim the same now.

The casting system is reasonably intuitive, and the gameplay itself is as fun as Torchlight, though the heavy corridor feel of the levels detracts a bit. There is a smattering of story and humor throughout, but I wouldn't call it story-driven.

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.

Expansive levels that make Portal look like a tech demo, with quite a few new fun mechanics and a lot of back-story about the Aperture Corporation. It's about three times as long as the original, and once again ends with fantastic music.

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.

A truly great puzzle platformer! Fun yet relaxing, this game has good graphics and three different characters - each with unique abilities. You can switch characters at any time using number keys, using their abilities to progress through the level

Shadowgrounds [Steam store page]
A reasonably fun top-down shooter with a sci-fi storyline. The NPCs occasionally block your movement during combat - luckily they don't seem to take team damage. The flashlight also runs out of batteries slowly, which pulls you out of the game a bit.

I'm on the fence about this game - the abilities are interesting, but execution of certain moves like jumping is difficult. I think this would be more fun as a puzzle game without the enemies, since the sluggish movement makes it difficult get away

Borderlands [Steam store page]
This is a weird mix of MMO leveling and FPS, and in a certain aspect it works okay, but at other times it can be frustrating.

The beginning of this game includes a lot of scripted sequences, which can be a bit annoying if you play through multiple times, as was intended (you reach level 35 or so on the first playthrough, 50+ on the second). The first time playing it seems incredibly smooth and well paced, teaching you all your necessary skills painlessly.

The game itself isn't hard - I was level 13 before I died the first time - but after a while it gets annoying to take headshots and not actually kill the enemy, like a normal FPS. This is due to the level mechanic - killing an enemy one level above you is difficult, and two is nearly impossible. The exception is playing the tank/melee character, who has a special ability that flattens higher levels with ease.

There is also a melee enemy class known as Psycho that has an annoying tendency, when injured, to run full tilt at you holding a hand grenade above their heads. Many times when this happens they are inescapably close, which results in your instant death.

Lastly, the bosses tend to take 3-10 minutes for a solo player to slowly tear through their massive health pools - almost like fighting an MMO raid boss on your own. Almost every boss also has a group of annoying normal enemies to dispatch during the beginning of the fight as well. These encounters are probably much more suited to the co-op gameplay.

Overall a mixed bag, fun in certain aspects, but also one of the few games that makes me feel angry when I play it. That's a sure sign the enemies aren't quite as balanced as they should be.