Loadout - Create, Customize, Kill!

Loadout managed to rank second place in most played ( for me) since I discovered it so I thought I'd post it here.

Loadout is a game in closed beta. To get a code, you must register your email and wait for the code. This can only be run through Steam.

Loadout is a cartoony fps(Think TF2). However, the main part of the game is the ability to...(drumroll)... build your own guns! You use parts to build the stock magazine, sight. barrel, trigger, type of gun (pulse, rocket, ballistic, and laser), and more.
From the Loadout site:

Spoiler

Loadout is an outrageus new multiplayer shooter that’s all about the guns, Baby! Build a massive variety of absolutely insane weaponry — over 50 million combinations — totally customized, totally unique, totally deadly.
You want a launcher that shoots ground-skimming rockets that explode into destructive clouds of flak? You got it!
How about a gun that shoots syringes filled with healing green glowing goo that bounces off walls? It’s done Son!
What about a remote controlled missile that sticks to enemies before destroying them in a massive blue ball of electric destruction? We got you covered.
Loadout is about total and uninhibited player expression. Craft your own guns, design your own loadout, dress your character to the nines, and play your way. Best of all? It’s absolutely free to play!

The game gives you one of each piece to build you first custom gun, and once you use the piece, you can buy more parts with their in-game currency that you earn by playing.
http://www.loadout.com