Collect the hidden Art and scan the ghosts/objects/entities to recieve the corresponding bonus. The bonuses will become available by default when the task has been completed and they can be disabled at the 'Options' screen.
No Equipment Overheat: Collect ALL scan data.
Faster Health Recovery: Collect 50 of the Art.
Equipment Strength Upgrade: Collect ALL Art.
Increased Scanning Speed: Scan 50 of ghosts and/or scannable objects in the game.
Gozerian Rookie Costume: Beat the game on the Gozerian (Hard) difficulty setting. This costume is immune to sliming.
Invulerability: Collect ALL of the Art and scan data and beat the game.