The Quality Index boasts over 45,000 reviews from websites like 148Apps, Pocket Gamer, and Touch My Apps, and uses a unique metric to create a single definitive score for each iPhone title.
After fending off hordes of ravenous Necromorphs in EA's survival horror shooter, Dead Space's saw-wielding hero Vandal still had to submit to Disc Drivin' at the top of Quality Index's January rundown.
Elsewhere on the games chart, three - yes, three - sequels secured prime positions thanks to widespread praise: the perspective-switching Shift! 2, perpetual-springing NinJump Deluxe, and the puzzle-solving Broken Sword - The Smoking Mirror: Remastered.
Qis Top 10 iPhone games of January 2011
| Pos. | Game | Qi rating | Reviews |
| 1. | Disc Drivin' | 9.2 | 3 |
| 2. | Dead Space | 9.0 | 12 |
| 3. | Shift! 2 | 9.0 | 4 |
| 4. | Papa Sangre | 8.8 | 8 |
| 5. | Save Toshi | 8.7 | 4 |
| 6. | Broken Sword - Smoking Mirror | 8.6 | 9 |
| 7. | NinJump Deluxe | 8.5 | 3 |
| 8. | Bug Heroes | 8.4 | 10 |
| 9. | Ramps | 8.3 | 4 |
| 10. | Cave Bowling | 8.3 | 3 |
N.B. While we only display the average score to one decimal place, the list is generated to further significant figures. We just don't show them all.
And, naturally, this is a static graph based on live listings which are subject to constant change as new releases and reviews emerge.
In order to provide a regular marker of the critical zeitgeist, however, we will continue to round up the best of the iPhone games released each month to provide the definitive Quality Index Top 10.
[source: Quality Index]
