Hold on to your butts, as this is a pretty killer deal here. Mobigame has just added a new title to their current Summer Sale promotion, the atmospheric action game Perfect Cell ($1.99). In Perfect Cell you play as an alien life form who crash lands on Earth and is subsequently captured by humans and kept in an underwater laboratory for studying. As you can imagine, that’s not exactly where you’d prefer to spend the rest of your days, so you embark on a journey to break out.

You make your way through each level of the laboratory using intuitive touch and drag controls, and your alien can be split into up to 3 separate pieces in order to solve environmental puzzles and advance. It’s really clever. Also, you can use a line-drawing type of mechanic to plan an attack on an enemy, dicing them up into pieces and then zipping back into the shadows before they ever knew what hit them.

You can read all about Perfect Cell in our review, but I’ve long felt that it launched during a busy holiday season and kind of got lost in the shuffle. It really is one of the more solid “hardcore” offerings on the App Store that is really well suited to the touch screen. The fact that you can get it for free right now is just mind boggling. Along with being free, Perfect Cell has also been updated with optimizations for the new iPad, anti-aliasing on all devices, and the return of the original (superior) icon.

Perfect Cell has never been free before, so if you haven’t given it a shot then do so immediately and don’t forget to hit up the rest of Mobigame’s sales which will last through the weekend.