Photograph 75 PP stickers.

Have Snowflake attack and damage a psychopath.

Take a picture of a psychopath.

Photograph a PP sticker.

Collect 50 combo cards.

Take a high PP value picture.

Get a Gold medal on all single-player challenges.

Get at least a Bronze medal on 10 different single-player challenges.

Visit 10 different maintenance rooms.

Kill 100,000 zombies.

Use the Jump Kick to knock down 100 zombies.

Dress up completely in women's clothing.

Kill 69 zombies.