Team Fortress 2 unlocks: Sniper

1- Main Weapon: Heavy Sniper Rifle
• Pros: powerful piercing rounds that pass through flesh and thin walls/objects. Optional (but overkill) feature: thermographic sniper scope.
• Cons: slower rate of fire. The weapon is heavy so the movement of the Sniper is decreased (although that could be a problem to implement). Clips with 5 rounds and longer reload. Maximum ammo capacity of 15 rounds.

2- Secondary Weapon: Silenced Submachinegun
• Pros: almost no noise, no flash. Hard to know where the shots are coming from.
• Cons: lower damage. Overheat.

3- Melee Weapon: Serrated Knife
• Pros: cause some seconds of bleeding after a hit.
• Cons: shorter range attack than the kukri (machete).

4- Hand Grenade: Tear Gas grenade – like in the Special Forces expansion of Battlefield 2, it blurs the vision and deals some damage. Good against other Snipers.

Like the Scout, this is a hard class to improve. However, a great addition would be a Grappling Hook in the place of the Secondary or Melee weapons. Valve (when adding the Sandwich) showed that changing things a little bit could make the game even funnier.

I would also like to suggest adding a clip reload animation for the standard sniper rifle (after all, all the 25 rounds are inside the weapon?).