Sorry for taking liberties with your time.
Score 100% in all missions. (The Ballad of Gay Tony)
Score 80% or above in all missions. (The Ballad of Gay Tony)
Finish the Ballad. (The Ballad of Gay Tony)
Freefall for the longest possible time. (The Ballad of Gay Tony)
Complete 25 drug wars. (The Ballad of Gay Tony)
Dance perfectly in both Tony's nightclubs. (The Ballad of Gay Tony)
Win the L.C. Cage Fighters championship. (The Ballad of Gay Tony)
Hit a flag with a golf ball four times. (The Ballad of Gay Tony)
Complete the Trinity. (The Ballad of Gay Tony)
Complete all base jumps. (The Ballad of Gay Tony)
Build Terry and Clay's toughness to 100%. (The Lost and Damned)
In the bike races, whack off 69 bikers with a bat. (The Lost and Damned)
Finish the story. (The Lost and Damned)
Become leader of The Lost. (The Lost and Damned)
Help Billy get his bike back. (The Lost and Damned)
You killed a Rockstar in multiplayer.
You won in all variations of multiplayer games.
You achieved the highest personal rank possible in multiplayer.
You won 20 different multiplayer standard races.
You successfully killed 20 players with a pistol in a deathmatch.
You were on the winning team in all multiplayer team games.
You completed "Deal Breaker", "Hangman's NOOSE" and "Bomb da Base II" in time.
You won a multiplayer race without damaging your vehicle too much.
You were successfully promoted up a rank in multiplayer.
You killed 5 opposing team members.
You completed GTA IV to 100%.
You finished the story in less than 30 hours.
You have completed the story.
You completed the mission "That Special Someone".
You've met all the random characters.
Your friends all like you above 90%.
You completed the mission "I'll Take Her".
You unlocked the special ability of Packie's car bomb placement.
You flew under all the main bridges in the game.
You collected every hidden package in the game.
You completed all 9 assassin missions.
You completed all the unique stunt jumps.
You delivered all 30 cars ordered through text message.
You unlocked all the islands.
You completed the mission "Museum Piece".
You have amassed a fortune of $500,000.
You unlocked the special ability of Brucie's helicopter ride.
You were invited into your girlfriend's house.
You have taken all variations of the helicopter tours of Liberty City.
You made a taxi trip from one island to another without skipping.
You completed the mission "Uncle Vlad".
You caught 20 criminals through the police computer.
You completed the most wanted side mission.
You completed all 10 Exotic Export orders.
You completed the mission "Roman's Sorrow".
You survived a 6 star wanted level for a full 5 minutes.
You exploded 10 vehicles in 10 seconds.
You unlocked the special ability of buying guns from Little Jacob.
You completed all 10 package delivery jobs.
You successfully lost a 4 star wanted rating.
You managed 5 car rolls in a row from one crash.
You unlocked the special ability of Roman's taxi.
You got a turkey in 10-pin bowling.
You completed a 500 foot wheelie on a motorbike.
You came first in 20 singleplayer street races.
You completed 10 melee counters in 4 minutes.
You beat the high score in QUB3D.
You beat a friend at pool.
You scored 180 with 3 darts.
You have completed the first mission.
