Section 8: Prejudice
60 Achievements
7-9h
PS3
Against All Odds
Win a complete game of Swarm
31.5%
How to unlock the Against All Odds achievement in Section 8: Prejudice - Definitive Guide
XniresistX
Can be obtained in LAN mode.
Just like the description says, choose the swarm game mode and play it through until the end. You can play it on any difficulty and I actually recommend medium difficulty so you can both get used to swarm and get used to the map that you played on for higher difficulties.