This game created a lot of buzz in the Mobile gaming category. The company released lot of variants of the same game after the success of the first game. Serious gamers will notice the stupid physics engine, for example sometimes the wooden planks stand at 60degree angle without falling. The recent release Angry birds 2, visuals are good, and they fixed one issue, ie changing the birds. physics engine got better but still need to improve. It even has a 3d environments.
One distinct version of the game is bad piggies. it deals with building things. you can use your creative building skills to beat the game which is fun.
Angry birds space is also unique which has its gravitational and spacy thing.
Angry Birds go is a go karting spinoff of mario go kart.
The varients of the game includes Angry Birds Space, Angry Birds Starwars, Angry Birds Rio, Angry Birds Season, AngryBirds Friends, AngryBirds Go, Angry Birds 2
Verdict
overall its a fun game to enjoy from Rovio Entertainment.