Chapter select...
	Easy "Multi-Kill Master" achie...
	No Mercy difficulty...
	Various Trophies...

Complete Campaign mode.

Select Chapter 5-3 under the Cakewalk difficulty setting. Go past the first door that is opened by your teammates. There is a usable checkpoint here. Run forward to the dump robots and aim at the gas cylinder. When you see approaching feet, shoot it. Restart from the checkpoint and repeat the process as many times as required.

Complete Campaign mode under the Survivor difficulty setting.

Complete the following tasks to unlock PlayStation 3 trophy rewards.

Trophy	How to unlock
A Friend Indeed (Bronze)	Purchase nanomachines for a teammate.
All Members (Bronze)	Add each teammate to the party at least once.
Assault Shooter Killer (Bronze)	Destroy 100 Assault Shooters in Campaign.
Battlemaster (Bronze)	Win an online vs. match with all rule sets.
Challenge Master (Gold)	Clear all online mode challenges.
Craftsman (Bronze)	Fully upgrade one weapon category.
Data Collector (Bronze)	Collect 20 SECURITY-COM in Campaign.
Data Retrieval Complete (Silver)	Collect all SECURITY-COM in Campaign.
First Victory (Bronze)	Win an online vs. match with any rule set.
Hacker (Bronze)	Destroy all enemies with the mobile gun battery.
Headshot Master (Bronze)	Get 50 headshot bonuses in Campaign.
Jackpot (Bronze)	Hit the jackpot on a vending machine.
Jumper (Bronze)	Get onto the Grand Lancer's head.
Lifesaver (Bronze)	Use first-aid kits to revive teammates 10 times.
Multi-Kill Master (Bronze)	Get 50 multi-kill bonuses in Campaign.
One-Shot Master (Bronze)	Get 50 one-shot bonuses in Campaign.
Platinum Trophy (Platinum)	Earn all other trophies in the game.
Resistance Hero (Bronze)	Clear all stages in INVASION mode.
Rust Crew (Silver)	Clear all chapters on SURVIVOR Mode.
Shop Master (Bronze)	Access all shopping terminals.
Skill Master (Silver)	Get all nanomachines within 1 playthrough in Campaign.
Smash Master (Bronze)	Get 50 smash bonuses in Campaign.
Spend 10,000 credits at vending machines.	Spend 10,000 credits at vending machines.
Spider Killer (Bronze)	Destroy all of the Spider's legs.
Still Alive (Bronze)	Clear a stage in INVASION mode.
Tactician (Bronze)	Get enemies to kill each other 50 times.
Transport Takedown (Bronze)	Destroy the Iron Whale's four engines.
Veteran Soldier (Silver)	Reach online level 50.
Weapon Crafter (Bronze)	Upgrade a weapon.