A Cut Above - Kill a gun-wielding Spy with your knife.
Agent Provocateur - Backstab your Steam Community friends 10 times.
Burn Notice - Survive 30 seconds after being ignited while cloaked.
Come In From The Cold - Get a Revenge kill with a backstab.
Constructus Interruptus - Kill an Engineer who is working on a sentry gun.
Counter Espionage - Backstab a disguised Spy.
Deep Undercover - While using the Cloak and Dagger, kill the same enemy 3 times, all within the same area in a single life.
Die Another Way - Kill a Sniper after your backstab breaks his Razorback.
Diplomacy - Kill 50 enemies with the Ambassador.
Dr. Nooooo - Backstab a Medic that is ready to deploy an ÜberCharge.
For Your Eyes Only - Provide an enemy with a freezecam shot of you flicking a cigarette onto their corpse.
Fyi I Am A Spy - Backstab a Medic who has healed you in the last 5 seconds.
High Value Target - Backstab an enemy who is dominating 3 or more of your teammates.
Identity Theft - Backstab the enemy that you're currently disguised as.
Insurance Fraud - Kill an enemy while you're being healed by an enemy Medic.
Is It Safe? - Backstab 50 enemies who are capturing control points.
Joint Operation - Sap an enemy sentry gun within 3 seconds of a teammate sapping another.
May I Cut In? - Backstab an enemy and the Medic healing him within 10 seconds of each other.
On Her Majesty\'s Secret Surface - Start capping a capture point within a second of it becoming available.
Point Breaker - Kill 15 enemies who are standing on a control point they own.
Sap Auteur - Destroy 1000 Engineer buildings with sappers.
Sapsucker - Sap an enemy building, then backstab the Engineer who built it within 5 seconds.
Skullpluggery - Headshot 20 Snipers with the Ambassador.
Slash And Burn - Backstab an enemy, who then switches to Pyro before they respawn.
Sleeper Agent - Kill an enemy who triggered your feign death in the last 20 seconds.
Spies Like Us - While cloaked, bump into an enemy cloaked Spy.
Spymaster - Backstab 1000 enemies.
The Man From P.u.n.c.t.u.r.e. - Stab an enemy while fencing.
The Man With The Broken Guns - Backstab an Engineer, then sap 3 of his buildings within 10 seconds.
The Melbourne Supremacy - Dominate a Sniper.
Triplecrossed - Backstab 3 Snipers in a single life.
Wetwork - Stab an enemy to death while under the influence of Jarate.
Who's Your Daddy? - Headshot 3 Scouts with the Ambassador.
You Only Shiv Thrice - Backstab 3 enemies within 10 seconds.