Get enemies to kill each other 50 times.
Add each teammate to the party at least once.
Fully upgrade one weapon category.
Continue playing to unlock this secret achievement.
Get 50 smash bonuses in Campaign.
Get 50 headshot bonuses in Campaign.
Destroy 100 Assault Shooters in Campaign.
Destroy all of the Spider's legs.
Destroy the Iron Whale's four engines.
Earn all other achievements in the game.
Get onto the Grand Lancer's head.
Destroy all enemies with the mobile gun battery.
Hit the jackpot on a vending machine.
Get 50 multi-kill bonuses in Campaign.
Get 50 one-shot bonuses in Campaign.
Use first-aid kits to revive teammates 10 times.
Purchase nanomachines for a teammate.
Access all shopping terminals.
Spend 10,000 credits at vending machines.
Upgrade a weapon.
Collect 20 SECURITY-COM in Campaign.
Collect all SECURITY-COM in Campaign.
Get all nanomachines within 1 playthrough in Campaign.
Clear all chapters on SURVIVOR Mode.
Win an online vs. match with any rule set.
Clear a stage in INVASION mode.
Clear all stages in INVASION mode.
Win an Xbox LIVE vs. match with all rule sets.
Clear all Xbox LIVE mode challenges.
Reach Xbox LIVE level 50.
