Spy Invisibility Exploit

This is a variation of the attack exploit and allows a spy to backstab people while maintaining stealth. Sorry for the shitty quality its the best one I could find on youtube without making my own. I'll try to get a better version

1. Melee Attack and press lastinv (q key) right away so you dont lose stealth
2. Press lastinv (q key) again to switch back to your melee weapon
3. You should automatically attack about 1 second
4. You should still be stealthed

The 10 second limit of stealth is the only thing keeping this exploit from being unstoppable.

Free Melee Attack Exploit

This is a variation of the guaranteed critical hit exploit and it allows you to preform 2 attacks at the same time with a melee weapon. Its the most deadly for a stealth spy but its useful for any class.

The steps to preform this exploit are:

1. Melee Attack and press lastinv (q key) right away
2. Press lastinv (q key) again to switch back to your melee weapon
3. You should automatically attack about 1 second
4. Make another melee attack at the same time for an instant double hit
   

Here is a video by Estryark showing the exploit in action.

Guaranteed Critical Hit Exploit

There is a new exploit involving weapon switching that allows you to get a critical hit every time you attack someone.

How to preform the exploit:

1. Attack
2. Press lastinv (q key) immediately before your attack lands

The electric crit sound will play if you did it right.



Here is a video by Estryark showing the exploit in action at around 17 seconds.

Spy Backstab Exploit

Its possible to backstab front facing players by priming your butterfly knife on front facing players and then changing your target to your victim.

This YouTube is the best example of how to preform the exploit. Its all about timing.



At first glance you would say that this is a critical knife to the front. Please notice the icon in the upper right corner that clearly marks the kill as a backstab.

A more advanced version of this "facestab" can be done by using movement to prime your backstab on the same player you kill.

Spy Disguise Exploit

A new spy exploit has been found in Team Fortress 2. A spy can attack with his butterfly knife or revolver and maintain his disguise if he changes his disguise and then makes his attack before the change completes. The spy can only maintain disguise if he waits at until about 1 second before the disguise change finishes.

The easiest way is to wait until the sound finishes playing before you attack. This exploit is all about perfect timing and is very hard to pull off.