Use Russell's Canteen three times.

Find the voice in the mist.

Defeat either the giant Anaconda or Crocodile with 2 players.

Find Kevin before Muntz does.

Locate Kevin for the first time.

Complete the level to start Carl's journey to Paradise Falls.

Defeat the first wave of combat planes.

Access the Multiplayer game menu.

Good guys feed the needy.

Wield the knife in single player or co-op mode.

Spend 50 hours on the pitch

Defeat 100 enemies with headshots