Prototype is the most fun I've had in a sandbox type game in a long time. For me, the only other game that had me this interested (in this genre) was Grand Theft Auto Vice City.
There is a lot of attention to detail that immerses you into this game. All NPCs seem to not only interact with you but to each other. The amount of NPCs that are provided without the performance hit is nothing like GTA IV.
You can upgrade your powers but I haven't gotten that far in the game yet to know what they are.
There is also a section which allows you to reply certain memories from those that are absorbed.
Not only can you use your own powers but you can use all sorts of weapons like the m16, the grenade launcher, rocket launcher, etc (I don't think I've seen them all yet).
Right now I am playing this game at 1920x1080 with 4xAA, all other settings maxed and it's very smooth game play. However, the game does tend to dip when there are tons of moving cars and NPCs about but not to a point were the game stutters.
If you are into games like
-Crack Down
-GTA
-etc
I believe you will enjoy this game. Prototype is IMO a very good game to buy.
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