When Angry Birds came out, there were a TON of clones that tries to emulate the mechanics and/or organization of the game. Some are outright clones (there's one featuring a beaver, or ninjas), but some are actually not too bad, and Fragger is one such.
Fragger is basically Angry Birds, except instead of firing birds with a slingshot, you throw grenades. The idea is to take out all the "terrorists" using the minimum amount of grenades possible.
Everything else is the same: 3 star system to measure how good you were, score, levels, and so on.
Not too bad, and a lot of levels, but not that original.