Complete any 5 puzzles without using the hint lever

Defeat the Fire Guardian

Complete 'Blood, Sweat and Tears' on any difficulty.

Get 5 headshots in a row using the same clip.

Complete 1 mission in Co-Op.

Complete Zone 1

Make a purchase in Howard's shop

Clear the second stage of Babel, the Menhir.

View all of the endings.

Get together forever with Catherine in the end.

Get dumped by Katherine in the end.

Use only Reflectors to destroy the generators in Phonica Moon's security tunnels. (2P +)