What are the top 10 violence games

I dont know the top 10 but modern warfare 2 might be 1.
 
Answer Do you mean, Top 10 Most Popular Violent games? or the Top 10 Most Violent Content games?

As for popularity, in no specific order, it would probably include:

Call of Duty Modern Warfare
Call of Duty Modern Warfare 2
Halo 3
Left 4 Dead 2
Doom (any)
Assassin's Creed 2
Resident Evil 4
Grand Theft Auto: All
Saints Row
God of War

^^^^^Those games are fairly popular games, containing moderate to heavy amounts of blood, gore, and violence.