Here is the full list of all 9 Nikoli's Sudoku V: 12 Gem Puzzle (Asia) trophies - there are 5 bronze, 2 silver and 2 gold.
Complete one puzzle 5 times
View all puzzle guides
Quit more than 50 puzzles
Exceed 24 hours total play time
UNDO 100 times
Complete a puzzle
Complete 12 puzzles in a row on shuffle with all puzzles selected
Beat the advanced target time for every puzzle
Complete all puzzles