yo_john117 on 05 September 2011
| Week | Halo 3: ODST | Halo: CEA | Net Difference |
| 11 | -- | 18,654/185,178 | -- |
| 10 | -- | -- | |
| 9 | -- | -- | |
| 8 | -- | -- | |
| 7 | -- | -- | |
| 6 | -- | -- | |
| 5 | 400,944/400,944* | ||
| 4 | 47,793/448,737 | ||
| 3 | 83,191/531,928 | ||
| 2 | 110,957/642,885 | ||
| 1 | 111,014/753,899 |
* That was the very first week of the pre-order chart.







