Devil May Cry 4

Beat up to and including level 70 in Bloody Palace mode. To unlock Bloody Palace mode, beat the game on Devil Hunter difficulty. Do not quite the game, you need to die or finish all 101 floors to get the achievement. Below are a list of the enemies from waves 61-70:

61 Bianco Angelo x4
62 Cutlass x2, Bianco Angelo x3
63 Blitz x1, Bianco Angelo x2
64 Bianco Angelo x1, Gladius x6
65 Bianco Angelo x7, Alto Angelo x1
66 Alto Angelo x1, Basilisk x4
67 Blitz x1, Alto Angelo x2
68 Bianco Angelo x2, Scarecrow x6
69 Alto Angelo x1, Frost x2
70 Bianco Angelo x10, Alto Angelo x2