Engine Block
Not unlocked yetPrevent the bomb from ever reaching an alarm zone during the final wave of an advanced difficulty mission.
Negative Charge
Not unlocked yetKill 5 Medics that are ready to deploy an ÜberCharge in a wave.
Silicon Slaughter
Not unlocked yetDestroy 100,000 robots.
Metal Massacre
Not unlocked yetDestroy 1,000,000 robots.
Ctrl + Assault + Delete
Not unlocked yetDestroy a sentry buster before it reaches its target.
Sly Voltage
Not unlocked yetAs a Spy, sap 10 robots at once.
Turbocharger
Not unlocked yetBuff 4 or more teammates as a Soldier at the same time in a single wave.
Heavy Mettle
Not unlocked yetDuring a wave, use rage as a Heavy to push a robot about to deliver the bomb.
Vial Sharing
Not unlocked yetAs a Medic, share your canteen 5 times in a single wave.
Tech Wrecker
Not unlocked yetAs a Demoman, kill 10 robots in a single detonation.
Do Androids Dream?
Not unlocked yetAs a Scout, use the Sandman to mark 15 robots for death in a single wave.
Spark Plugger
Not unlocked yetAs a Sniper, kill 4 robots simultaneously.
Hard Reset
Not unlocked yetAs a Pyro, reset the bomb 3 times in a single wave.
Real Steal
Not unlocked yetAs an Engineer, escape with your sentry as a sentry buster is about to detonate.
A Lovely Vacation Spot
Not unlocked yetGet to Skull Island and claim your reward!
Wizards Never Prosper
Not unlocked yetKill MERASMUS!
Helltower: Hell's Spells
Not unlocked yetGet and use a rare spell
Helltower: Competitive Spirit
Not unlocked yetWin 142 rounds
Helltower: Mine Games
Not unlocked yetPerform 17 environmental kills in Hell
Helltower: Skeleton Coup
Not unlocked yetKill 99 skeletons
Helltower: Spelling Spree
Not unlocked yetUse spells to kill 25 players
Helltower: The Mann-tastic Four
Not unlocked yetEarn 4 of the Helltower achievements
Helltower: Hat Out of Hell
Not unlocked yetGet the loot from Skull Island in Hell
Helltower: Hell on Wheels
Not unlocked yetSend Redmond/Blutarch to Hell 10 times