Those who pre-order inFamous through GameStop will get an exclusive in-game power not available elsewhere, as you can see D’toid.
When you reserve your copy, it will come with a code that unlocks the “Gigawatt Blades Power” which is essentially blades extending from the wrist, allowing a single blow to enemies.
Apparently it allows you the option to tickle as well. Strange that.
The game’s out in June.