- Spark Plugger
As a Sniper, kill 4 enemies simultaneously.
- Maximum Performance
Max out all resistances on a single class.
- Turbocharger
Buff 4 or more teammates as a Soldier at the same time in a single wave.
- Clockwork Conqueror
Destroy a tank within 20 seconds of its arrival.
- Kritical Terror
Use a canteen charged with 'Crit Boost' to destroy a giant robot.
- Steel Fragnolias
Complete all waves successfully in a mission.
- Balls-E
Destroy the tank during the final seconds of the bomb being deployed.
- Engine Block
Prevent the bomb from ever reaching an alarm zone during the final wave of an advanced difficulty mission.
- Deus Ex Machina
Defeat a wave in an advanced difficulty mission without dying once.
- Real Steal
As an Engineer, escape with your sentry as a sentry buster is about to detonate.
- System Upgrade
Max out all primary weapon upgrades.
- Ctrl + Assault + Delete
Destroy a sentry buster before it reaches its target.
- Wage Against the Machine
Earn a credit bonus at the end of a wave.
- .executioner
In a single wave, kill 15 bomb-carrying robots in a row before they level up.
- German Engineering
Use a canteen charged with 'ÜberCharge' to destroy 15 robots.
- Fast Cache
Pick up a credit pile that is about to expire.
- Frags to Riches
Earn all credit bonuses in an advanced difficulty mission.
- T-1000000
Collect 1,000,000 credits in your career.
Locked - 2 guides
- Brotherhood of Steel
Complete a mission with 5 people on your Friends List.
- Hack of All Trades
Play an entire mission as a single class, and do this for every class.
- Clockwork Carnage
Destroy two tanks within 5 seconds of each other.
- Spam Blocker
During a wave, defend the hatch 10 times from robots about to deliver a bomb.
- Raid Array
Complete the Crash Course, Doe's Drill, and Mann-euvers missions.
- Ghost in the Machine
Use a canteen charged with 'Teleport to Spawn' and then kill the bomb carrier within 5 seconds.
- Undelete
During a wave, use a canteen charged with 'Instant Building Upgrade' to build a new sentry gun within 3 seconds of your previous sentry gun's destruction.
- Shell Extension
During a wave, use a canteen charged with 'Ammo Reload' to refill an empty weapon slot.
- Negative Charge
Kill 5 Medics that are ready to deploy an ÜberCharge in a wave.
- Silicon Slaughter
Destroy 100,000 robots.
- Metal Massacre
Destroy 1,000,000 robots.
- Sly Voltage
As a Spy, sap 10 robots at once.
- Heavy Mettle
During a wave, use rage as a Heavy to push a robot about to deliver the bomb.
- Vial Sharing
As a Medic, share your canteen 5 times in a single wave.
- Tech Wrecker
As a Demoman, kill 10 robots in a single detonation.
- Do Androids Dream?
As a Scout, use the Sandman to mark 15 robots for death in a single wave.
- Hard Reset
As a Pyro, reset the bomb 3 times in a single wave.