The Engineer Update Title update for Team Fortress 2 has 38 achievements.
Teleport 100 team members into battle.
Have dispensers you created dispense a combined amount of 100,000 health over your career.
Rack up 5000 kills with your sentry guns.
Destroy 25 sappers on buildings built by other team members.
Haul buildings 1 km over your career.
Repair a sentry gun under fire while being healed by a Medic.
Repair 50,000 damage to friendly buildings constructed by other players.
Pick up 10,000 waste metal from pieces of destroyed buildings.
Upgrade 50 buildings built by other team members.
Destroy 50 enemy stickybombs lying in range of friendly buildings.
Use a sentry gun to kill 25 enemy players that are capturing a point.
Kill 20 players carrying the intelligence.
Perform 50 repairs and/or reloads on a Sentry gun being Wrangled by another Engineer.
Have a sentry shielded by the Wrangler absorb 500 damage without being destroyed.
Kill 10 Snipers with a sentry gun under control of your Wrangler.
Kill 10 enemies outside the normal sentry gun range using the Wrangler.
Destroy an enemy Engineer's sentry gun with a sentry under control of your Wrangler.
Kill 3 cloaked Spies with a sentry gun under control of your Wrangler.
Have dispensers you built extinguish 20 burning players.
Kill a disguised spy with your Wrench.
Achieve 17 of the achievements in the Engineer pack.
Kill 3 enemies with revenge crits without dying.
Use your shotgun to finish off an enemy recently damaged by your sentry gun.
Provide an enemy player with a freeze cam of your guitar playing skills.
Use a revenge crit to kill the enemy player that destroyed your sentry gun.
Help a teammate construct a building.
Achieve 11 of the achievements in the Engineer pack.
Kill a spy and two sappers within 10 seconds.
Smash an enemy player's head in with your guitar.
Manage to get to and then remove a sapper placed on your building while you were several meters away.
Have your sentry kill the enemy that just killed you within 10 seconds.
Have a dispenser heal 3 teammates at the same time.
Achieve 5 of the achievements in the Engineer pack.
Get 10 assists with another Engineer where a sentry gun was involved in the kill.
Help a single building tank over 2000 damage without being destroyed.
Haul a level 3 sentry gun into a position where it achieves a kill shortly after being redeployed.
Provide an enemy player with a freeze cam of you and the sentry that just killed them.
Keep a Heavy healed with your dispenser while he gains 5 kills.