Neoseeker's social site GameGrep has been the portal for many popular game compilations, many of which were made by blog sites and other independent sources.

Using game sales data from January through August 2008, the NPD research group, in correspondence with Gamasutra, has released the top five best-sellers in the US for all three consoles out on the market.  Some of the results are surprising, but it's mostly predictable -- though not quite so much as PC game charts.

Starting with the Nintendo Wii, the top five games by number of units sold are as follows:

1. Super Smash Bros. Brawl
2. Mario Kart (with Wheel)
3. Wii Play (with Remote)
4. Wii Fit (with Balance Board)
5. Guitar Hero III: Legends of Rock (with Guitar)

And they say the Wii is for casual gamers.

Next up is the top five Xbox 360 sellers, and number one is definitely a no-brainer:

1. Grant Theft Auto IV
2. Call of Duty 4: Modern Warfare
3. Madden NFL 09
4. Tom Clancy's Rainbow Six: Vegas 2
5. Army of Two

Currently, four of the five games appear to reflect that Xbox 360 stereotype of shooter fanatics.  With Microsoft aiming to expand on the 360 demographic, however, another list such as this might yield different results in another few months.

Many have been debating which game is more popular on the PlayStation 3 -- Konami's Metal Gear Solid 4 or Rockstar's Grand Theft Auto IV?  Both have enjoyed overwhelming success, but GTA IV takes number one in terms of US sales:

1. Grand Theft Auto IV
2. Metal Gear Solid 4: Guns of the Patriots
3. Call of Duty 4: Modern Warfare
4. Madden NFL 09
5. Gran Turismo 5: Prologue

Each chart does note that the data only applies to individual SKUs without taking into account each game's other editions, such as collector's editions or premium bundles.