Complete any single player level with the waypoints turned off.

Purchase any weapon upgrade (in single player).

Access the map screen (in single player).

Complete Mission 3 (Any Difficulty Level)

Level up any one character to level 50.

Complete a level in Co-op

Destroy 1000 Crates

Kill 1000 enemies

With Hit Girl, Kill 2 enemies in one wall run attack.

Complete the game in Normal Difficulty

Set off the security camera 5 times in one level.

Perform a 3-Hit Combo

Heard 7 references no one under the age of 30 will understand.