Here is the full list of all 45 Yakuza 3 trophies - there are 36 bronze, 5 silver, 3 gold and 1 platinum.
Earn all other trophies in the game.
Beat the game on Extra Hard.
Complete all substories.
Claim victory in all Coliseum tournaments.
Play all rounds in Ultimate Skill mode after beating the game.
Apprehend all hitmen.
Beat the game.
Defeat Mine in Chapter 12.
Defeat Fuma in Chapter 10.
Order the most expensive item(s) in all restaurants.
Encounter all the masters.
Defeat Lau Ka Long in Chapter 8.
Complete 80 substories.
Defeat Majima again in Chapter 7.
Defeat Kanda in Chapter 6.
Complete all minigames.
Complete trophy conditions for the games in the arcade. Get 10 stuffed animals in UFO Catcher, and get a high score in the shooting game.
Earn a combined total of 10,000 points in poker, roulette and blackjack.
Complete 50 substories.
Get a turkey while bowling.
Hit 2 panels with one ball in the Hard game at the batting cage.
Open all the lockers in the top row in both Kamurocho and Downtown Ryukyu.
Defeat man in black suit in Chapter 5.
Defeat Hasebe in Chapter 4.
Have your first Revelation.
Complete 30 substories.
Complete 10 substories.
Defeat Tamashiro in Chapter 3.
Make a mod weapon.
Catch a tuna.
Finish 50 battles with HEAT actions.
Sing all songs at karaoke.
Hit a 350 yard drive in Competition Mode in golf.
Break 100 weapons picked up in battles.
Accumulate 10,000,000 yen.
Run 42.195km.
Get a break ace in Nine-Ball pool.
Get a hat trick in darts.
Earn a combined total of 10,000 points in cee-lo, cho-han, koi-koi and oicho-kabu.
Initiate 10 battles by using first-person mode.
Remove 30 pieces of garbage from Sunshine beach.
Remove 5 pieces of garbage from Sunshine beach.
Defeat Rikiya in Chapter 2.
Defeat Majima in Chapter 1.
Knock over 100 people.