To give you an idea of ONE of the character classes from TF2 check this definition of the Spy class out, it sounds dope.
Spy
The spy is lightly armored and is used for infiltrating, assassinating and sabotaging the enemy team and is capable of diguising himself as any class on either side. When undisguised, the spy speaks with a Franco-Spanish accent, and wears a team-coloured, pin-stripe suit with a team-coloured, full-face balaclava. He wields a revolver, a butterfly knife, an electric sapper, and a disguises kit. He chain smokes even when in disguise. While disguised, allies perceive the spy as usual but with a paper mask of the class he is disguised as over his face. Spies randomly use an alias name of an enemy, occasionally having his cover blown by the player he is mimicking. Spies can take damage when disguised and show blood. Since teammates can no longer damage each other, players often shoot their allies and then watch to see if they bleed. Spies also have the ability to cloak for a maximum of ten seconds. This cloak must recharge after use[20], and can be disrupted by enemy fire, contact with an enemy player or by being set alight by the Pyro’s flamethrower. Spies cannot attack through the cloak, but they can disguise whilst cloaked and vice versa. Using a combination of cloaking and disguises allows spies infiltrate the enemy team with little trouble, although a spy must be careful to avoid being spotted cloaking or decloaking. Armed with a powerful revolver[20] and a butterfly knife that can kill instantly if used from behind, a spy loses their disguise the moment they attack. Spies also carry electronic sappers that are placed on enemy structures, disabling them and slowly damaging them to destruction unless an engineer repairs their sabotaged equipment. A spy’s disguise is not lost when he places a sapper.[20].
The concept is fucking dope as hell.
More info on classes and game available at…