GTA IV Multiplayer was amazing if you played it with friends on microphones.
Jumping scooters into rotor blades and seeing how far you could get flicked, one in a helicopter and one in a NOOSE Van with both on 6 stars, racing through train tunnels on dirtbikes, so good. There was so much good in GTA IV but everybody overlooked it because you can't get a purple dildo and whack people with it while flying a jetpack.