Manage to get to and then remove a sapper placed on your building while you were several meters away.

Repair a sentry gun under fire while being healed by a Medic.

Repair 50,000 damage to friendly buildings constructed by other players.

Kill 3 enemies with revenge crits without dying.

Use a revenge crit to kill the enemy player that destroyed your sentry gun.

Have your sentry kill the enemy that just killed you within 10 seconds.

Use a sentry gun to kill 25 enemy players that are capturing a point.

Rack up 5000 kills with your sentry guns.

Use your shotgun to finish off an enemy recently damaged by your sentry gun.

Help a single building tank over 2000 damage without being destroyed.

Smash an enemy player's head in with your guitar.

Teleport 100 team members into battle.

Upgrade 50 buildings built by other team members.

Pick up 10,000 waste metal from pieces of destroyed buildings.

Jump into a pool of refreshing water while on fire.

Kill an enemy within 5 seconds of you traveling through an Engineer's teleporter.

Get five kills in a row without dying.

Get 25 headshots as a Sniper.

Trick an opposing Medic into healing you.

Accumulate 25000 heal points as a Medic.

Accumulate 1000 total kills.

Accumulate 10 sentry gun kills with a single sentry.

Kill the Horseless Headless Horsemann.

Collect the Horseless Headless Horsemann's Haunted Metal.