Listmania!
True Open World XBOX 360
By an Amazon.com customer
Grand Theft Auto IVGrand Theft Auto IV
Buy new: $26.99 / Used from: $15.86
GTA IV on the 360 if you don't know, why are you even reading this
Elder Scrolls IV OblivionElder Scrolls IV Oblivion
Buy new: $73.51 / Used from: $11.24
Its not a GTA CLONE, but its as open world as you get.
Crackdown (Platinum Hits)Crackdown (Platinum Hits)
Buy new: $16.69 / Used from: $6.96
a Superhero GTA IV clone, its fun and the cheat program is great for your not so gamer friends.
Saints Row (Platinum Hits)Saints Row (Platinum Hits)
Buy new: $15.49 / Used from: $4.82
It GTA San Andreas, period, not really but if you liked San Andreas its fun, I liked it up but I can't say I played it as much as any other game on this list. The new one looks promising
Assassin's CreedAssassin's Creed
Buy new: $19.99 / Used from: $11.98
Its defiantly a first class true open world. Not my favorite game, but its open world prince of Persia
Mercenaries 2: World in FlamesMercenaries 2: World in Flames
Buy new: $18.49 / Used from: $7.99
This game was really fun and I would defiantly consider it True Open world
Dead RisingDead Rising
Buy new: $19.49 / Used from: $9.98
Its an open world zombie kill fest, True Open World.
Burnout ParadiseBurnout Paradise
Buy new: $19.49 / Used from: $9.68
Open world racer, it midnight club and burn out
Saints Row 2Saints Row 2
Buy new: $29.99 / Used from: $14.93
Open world but can't say much its not out yet
Fallout 3Fallout 3
Buy new: $36.99 / Used from: $22.99
Open World, but I hope the gameplay is nothing like the old Fallout, I really just can't get into the turn based chess type games. But it looks to be more like Oblivion in terms of gameplay
Far Cry 2Far Cry 2
Buy new: $29.99 / Used from: $11.95
I'm hoping for a true open world title, and next week I'll find out
PROTOTYPEPROTOTYPE
Buy new: $39.49 / Used from: $26.91
Looks to be what I had hoped Crackdown would of been, but too early to tell if it will live up to expectations
The Godfather the GameThe Godfather the Game
Buy new: $88.19 / Used from: $10.96
It was fun, not the greatest game, but it was a True Open World