ProtoSlice

Slice HD is one of best and most gruesome puzzle games on the App Store. Realizing this, Activision partnered with TwitchGames to create ProtoSlice, a fun and free take on the aforementioned title that delivers a similar Slice HD experience while promoting the upcoming console game, Prototype 2.

The original tasks you with carefully avoiding razor sharp knives to push a red button. Touch a sharp edge, and a jarring splatter of blood splashes the screen. It gets pretty nuts, since you'll need to contort your fingers in all manner of positions while the stress level increases exponentially.

ProtoSlice works exactly the same way, except those gleaming pieces of cutlery were replaced with equally dangerous Prototype blades obscuring P2 panic buttons.

To succeed, you'll need a ton of patience and good hand to eye coordination, as you slowly pull back and retract those blades to reveal the button(s) in the quickest time possible; beating the clock is more of a personal goal, since the game lacks online leaderboards, a glaring issue that also plagues Slice HD.

Ultimately, that's our biggest complaint. ProtoSlice doesn't go beyond the original formula. There are no in-game achievements or leaderboards to speak of, which sort of undermines the whole point of completing a puzzle in ten seconds versus 15.

On top of that, the multiple colors of the blades (silver, black and red) make it a bit difficult to avoid sharp areas. Prepare for much trial and error.

At the end of the day, this is more of a promotional vehicle for Prototype 2, with screenshots between puzzles and a link to the game's website. That said, it's still worth a look.

Download it to your device of choice, then spend the modest amount of cash to grab Slice HD.

Requirements: Compatible with iPhone, iPod touch, and iPad. Requires iOS 3.0 or later.

Download ProtoSlice

Requirements: Compatible with iPad. Requires iOS 3.2 or later.

Download ProtoSlice HD