MicroVolts is the latest Free To Play game on Steam. All new players will receive a free Y-U-No Rage Face mask. The meme thing.
Also until July 12th you can get the MicroVolts starter pack for $7.99 / £5.59 / €7.99 (20% off).
- It includes the Advanced Pepper Rifle, 500 Energy Charges, and 7 days access to the Bomb Keyring and Multi-Vitamin bonuses!
I read on the forums and it sounds like the game might be pay to win so I would definitely try the game first.