Chaos on Deponia (EP)

Story-related and cannot be missed.

In Act III, Rufus and Baby Goal can visit a seer. Once you both sit down with him, choose the following dialogue options: How do I prevent Goal from marrying Cletus? / What does our future together look like? / This is all humbug. You're holding the ball upside down.

At this point, you'll have the option to access your inventory. Use the remote on Baby Goal to access Spunky Goal. At that point, keep talking to the seer about the lottery until Spunky Goal snaps and attacks him. The trophy will unlock when you regain control of Rufus outside of the seer's tent.