You completed the mission "I'll Take Her".

You unlocked the special ability of Packie's car bomb placement.

You completed the mission "Museum Piece".

You unlocked the special ability of buying guns from Little Jacob.

You beat a friend at pool.

You completed a 500 foot wheelie on a motorbike.

You completed the mission "Roman's Sorrow".

You unlocked the special ability of Roman's taxi.

You have completed the first mission.

You killed a Rockstar in multiplayer.