| Kresnik said: As far as I can tell, comparing VGChartz numbers up to August 24th vs. these numbers up to June 30th: |
I went ahead and recorded European VGChartz numbers from January to June and compared them directly with GFK's numbers for you to use in the OP:
| Game | GFK | Vgchartz | Under/Over-tracked |
| Fifa 13 |
1,898,171 |
1,407,207 (PS2 n/a) |
Undertracked = 490,964 |
| Call of Duty: Black Ops II |
1,413,624 |
1,184,633 | Undertracked = 228,991 |
| Tomb Raider |
1,363,611 |
1,196,207 | Undertracked = 167,404 |
| FarCry 3 |
938,400 | 909,745 | Undertracked = 28,655 |
| The Last of Us | 858,636 | 822,400 | Undertracked = 36,236 |
| Assassin's Creed III |
839,733 |
656,026 | Undertracked = 183,707 |
| Bioshock Infinite |
732,735 |
721,230 | Undertracked = 11,505 |
| Just Dance 4 |
689,644 |
478,281 | Undertracked = 211,363 |
| Crysis 3 |
689,468 |
471,278 | Undertracked = 218,190 |
| Need For Speed: Most Wanted 2012 |
684,341 |
539,131 | Undertracked = 145,210 |
| Battlefield 3 |
579,013 |
341,764 | Undertracked = 237,249 |
| Skylanders Giants |
537,164 |
330,562 | Undertracked = 206,602 |
| StarCraft II: Heart Of The Swarm | 512,536 |
275,774 | Undertracked = 236,762 |
| Simcity 2013 |
509,700 |
408,535 | Undertracked = 101,165 |
| Luigi's Mansion 2 | 478,612 |
406,600 | Undertracked = 72,012 |
| The Elder Scrolls V: Skyrim |
470,910 |
499,348 | Overtracked = 28,438 |
| God of War: Ascension |
466,722 |
305,967 | Undertracked = 160,755 |
| New Super Mario Bros. 2 |
433,900 |
358,135 | Undertracked = 75,765 |
| Dead Space 3 |
431,575 |
369,570 | Undertracked = 62,005 |
| Gears of War: Judgment |
304,054 |
334,844 | Overtracked = 30,790 |
Looks like VGChartz has some serious adjusting to do, also I'm happy that God of War: Ascension wasn't a big flop! It was undertracked 49K 1st month US (NPD), undertracked 161K by June in EU (GFK) which means the game's undertracked by an absolute minimum of 200K. Since the EU numbers are by the end of June we need to add 2 months of data to 0.47m & we don't know how undertracked it is in the US other than its 1st month so I bet it's undertracked by 350K+ . It should roughly be at ~1.70m by now, could definitely hit 2 million by the end of the year and 3m+ lifetime which is really great for the weakest GoW on console in an unpopular genre and considering it was once called a massive flop by many.
