Get Your First Gold Medal

Obtained the Special Forces costume.

Complete The Underground

Complete Toot Toot Splat by only juicing up once

Feed carnivorous plants with three or more different kinds of treats

Catch Totec with the grapple while he is jumping over a death fall

Earn the top score objective in any level

Play Co-op mode

Play an offline-only game. (2P +)

Destroy 30 enemies while they're distracted by the Doppelbanger.

Kill three enemies with one attack using the Blitzer.

Complete Terawatt Forest.

Kill eight enemies in eight seconds using the Darkstar Fission Tether with two or more teammates.