Defeat Donna and Angie.

While playing as Colt, cause someone to fall to their death.

Absorb Residuum from a body - like some kind of temporal sponge.

After acquiring Reprise, die for real - or what passes for real in the Loop.

Survive all 4 time periods in one day.

While playing as Colt, kill Frank. Or Charlie. Or Fia. Or Wenjie. Or Aleksis. Or Harriet. Egor will do as well.

Use Photo Mode.

Solve a Labyrinth.

Unlock a simple lock with a lockpick.

Escape the mine.

Destroy a Goat of Warding.

Craft an item in the Crafting menu.

Wear the outfit of a dead player.