Here is the full list of all 20 The Great Tournament achievements.
Finish the game with a high dark stat.
Finish the game with a high light stat.
Win the team melee at the festival.
Beat Varys at Darts.
Win The Great Tournament.
Change the government of Magincia from a monarchy to a republic.
Become King of Magincia.
Become heir to the throne.
Convince someone the guard you play the kazoo for the King.
Get a full team for the team melee.
Find and rescue Sir Robert.
Follow Sir Robert to a secret meeting.
Finish the game with 8,000 gold or more.
Uncover which noble is working for Sir Cuthvell.
Reveal enemy spy activities.
Learn to use fire magic.
Defend Redwood from bandits.
Beat the game with a high wisdom stat.
Beat the game with a high score.
Beat the game on hard.