Kill 25 enemies through a wall with the rail driver.

Complete all side missions in Santa Modesta.

Kill 25 enemies with the precision rifle.

Kill 500 enemies.

Kill 25 enemies with the submachine gun.

Kill 50 enemies with the shotgun.

See the ending

Escape from the underwater research facility with Gryphon without triggering an alarm.

Reach Gryphon without triggering an alarm.

Kill 50 enemies with the assault rifle.

Miss the shuttle.

Hear Eos's first message.

Complete "Furon Loathing in Bay City."