Okay hear me out:

Scout: Basically a fastest class character and double jumping with the low health and better than tracer from overwatch.

Soldier: R O C K E T J U M P

Pyro: Fire (unless they had the fempyro mod because it was a meme)

Demoman: Basically soldier's rocket jump but with the second gun

Heavy: 300 HP, plot armor and a freakin' minigun

Engineer: Engineer gaming (also they had the mimi sentry mod lol)

Medic: Heal da teammates in the game

Sniper: How to headshot with the sniper (yes i use him as a main class)

Spy: T R I C K S T A B