I really think most of them are. Its just hard for me to believe that 1 guy can gather information all around the world from limited resources and have the data be accurate. I also cant remember a time when sales data comes in from game from the publisher and the game not needing adjustments.

Well, since vgchartz is a sales estimation site, most likely all of the games are.

MotorStorm Pacific Rift. They reported shipping 1m last year, here it is still at 760k... it is all on the game's page

Most older generation games are really undertracked, due to the fact that most regions didn't report the sales. I think it's safe to assume that the best estimations are current generation games.

Probably most past gen games since it's really hard to track. Current gen games however are good.

Many games from past gen's are undertracked from there being no data in most places..

Large margins, um. Ya i would have to say motorstorm pacific rift. I also heard that MGS4 has already hit 5 million, so it's undertracked by around 600k. Also, grand theft auto IV. The gap should be a lot closer from what i've heard from Rock star i think the ps3 version is undertracked and the 360 version is overtracked.

i believe none are over or under

except the ones that are missing certain regions sales but it clearly displays that most of those SW are from the early days of this gen though

if this sites #s werent accurate enough do u really think BHR-3 would of joined it?

Chaos Legion is Undertracked thats for damn sure. maybe even Valkyria Chronicles.

Aquanauts Holiday sure as hell is undertracked (that has to be the most imported game from playasia.com), also warhawk (due to psn downloads), socom confrontation, and shin megami tensei nocturne (no way that game sold that little on that install base in Japan and America)and the original killzone (GG said it sold 2.77 million).