that depends on what genre of game u like..

if rpg, i'd suggest
1. halo spartan
2. modern combat 4
3. the dark knight
4. six gun

if racing,
1. asphalt 8
2. turbo

the rest are
- bejeweled+
- angry birds series
- alphajax
- the sim freeplay
- jetpack joyride

just beware that some of these games require a big space of memory so make sure u have enough memory if u wanna install these games.