Here is the full list of all 13 Lion Quest Infinity achievements.
Steal the Grandfather clock
Complete Jefferson's tutorial
Discover the 49th Law
Complete The Red Room
Complete the main story
Find a basketball
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Complete Sloth Tales
Play Here Comes Missile Kid
Look inside Adrian’s bag
Make a very special entrance
Score 21 or over in Here Comes Missile Kid
Survive the Gauntlet