Complete the South America episode in single player or cooperative.

Kill 20 enemies with the Minigun without releasing the trigger.

Pull out a single Colt and immediately deliver a killing shot.

Find 13 Standing Stones

Reached the Omega Space Gun

Changed body at Omicron

Failed at acquiring the DUNBAT

Crash-landed on peak Delta

Talked to Catherine Chun

Squash 10 Hatchling spiders.

Obtain the Water Element.

Obtain the Earth Element.

Kill at least 5 headless kamikazes in one explosion.