Fly on all helicopter tours of Liberty City.

Complete all 9 assassin missions.

Do a wheelie lasting at least 500 feet on a motorbike.

Do 5 car rolls in a row from one crash.

You must blow up 10 vehicles in 10 seconds.

Successfully date a girl to be invited into her house.

Complete all 10 package delivery jobs.

Become leader of The Lost. (The Lost and Damned)

Build Terry and Clay's toughness to 100%. (The Lost and Damned)

Finish the story. (The Lost and Damned)

Help Billy get his bike back. (The Lost and Damned)

In the bike races, whack off 69 bikers with a bat. (The Lost and Damned)

Score 100% in all missions. (The Ballad of Gay Tony)

Complete all base jumps. (The Ballad of Gay Tony)

Dance perfectly in both Tony's nightclubs. (The Ballad of Gay Tony)

Complete 25 drug wars. (The Ballad of Gay Tony)

Score 80% or above in all missions. (The Ballad of Gay Tony)

Win the L.C. Cage Fighters championship. (The Ballad of Gay Tony)

Freefall for the longest possible time. (The Ballad of Gay Tony)

Hit a flag with a golf ball four times. (The Ballad of Gay Tony)

Finish the Ballad. (The Ballad of Gay Tony)

Complete the Trinity. (The Ballad of Gay Tony)

After meeting all possible friends, the ones left alive all like you above 90%.

Achieve 100% in "Game progress" statistic.