Check the additional info for the first time when a tip appeared.

Clear Normal Mode without reverting to Easy Mode.

Complete or finish twenty substories.

Clear Part 2 of the story.

Clear Part 1 of the story.

Complete or finish four substories.

Make it past Olmec's Lair in a non-seeded run.

Obtain the Kapala in a non-seeded run.

Bring two turkeys to Yang in a non-seeded run.

Unlock the entrance.

Complete every goal in THPS1 Classic and gain all gold medals.

Achieve a judge score of 99.9 on a competition run.

Killed at least one of every type of Reconnaissance machine.