Well, I guess Borderlands, because that's the only game that they bought for me that was rated M before I turned 17.
Although, I guess technically it would still be Assassin's Creed II, because even though I was old enough to play it at the time, they still bought it.
Although, I guess technically it would still be Assassin's Creed II, because even though I was old enough to play it at the time, they still bought it.