Finish the prologue
Finish Chapter One
Finish Chapter Two, The Bank
Finish Chapter Three, The Church
Finish Chapter Four, Underground
Finish Chapter Five, Mountain
Finish Chapter Six, The Cave
Finish Chapter Seven Part 1
Finish Chapter Seven Part 2
Finish Chapter Seven Part 3
Complete Chapter Eight
Complete Chapter Nine
Complete Chapter Ten
Complete Chapter Eleven
Forget crystal shards in the car.
Complete Chapter Twelve
Complete Chapter Thirteen Part 1
Complete Chapter Thirteen Part 2
Complete Chapter Fourteen
Complete Chapter XV part 1
Fastest gun in the West
Beat high score in Duel Arcade (Chapter 12)
Find a Treasure island in Voyage Arcade Game (Chapter 12)
Finish all the chores
Delete the interrogation record
Get maximum points at the shooting range (Chapter 15 part 2)
Complite Chapter XV part 2
Complete Chapter 15 Part 3
End of the game
Explode some stuff while driving a tank
Correct mistake
Complete Blackmail chapter