Complete all levels set in temples.

Find all jade dragons.

Complete all levels set in the mountains.

Find 20 scrolls.

Find 10 scrolls.

Complete all extra sections.

Finish a Cheese Hunt level with 100% integrity

Kill 5 enemies in 5 seconds with the Plasma Rifle.

Complete 8 different levels sequentially under par time without dying on Ultra-Violence or higher.

Reach the end of 'Legacy of Rust'.

Reach the end of 'Sigil'.

Reach the end of 'The Plutonia Experiment'.