Complete the indicated task to unlock the corresponding entry at the "Options" menu.

Entry	How to unlock
Equipment Strength Upgrade	Collect all art.
Faster Health Recovery	Collect 50% of the art.
Gozerian Rookie Outfit	Complete the game under the Gozerian difficulty. This outfit will allow you to be immune to sliming.
Increased Scanning Speed	Scan 50% of the ghosts and scannable objects.
Invulnerability	Complete the game with all art collected and scan 100% of the ghosts and scannable objects.
No Equipment Overheat	Scan 100% of the ghosts of scannable objects.