Here is the full list of all 9 AgrChamp achievements.
Defeat the red monster.
Make the first jump.
Help old Agraelus find his legs.
Help Radovan put out the fire.
Put together a new computer.
Avoid all the waves, sent after you by an insidious mermaid.
Get to the last final exam
First touch with KingKong
Be in the game at least 2 hours