k well COD zombies is like the console version with iphone controls, if you like COD zombies on your x360 or ps3 then dont hesitate to get the iphone version its pretty fun and everything runs smoothly. 3 control options too.
Ravensword is good, its an adventure game more than an RPG.
Skater nation I haven't played yet.
Check out the Black Friday sale compiled list thread, you can get a bunch of good games for cheap.