Upgrade

Upgrades are a scrapped feature in Left 4 Dead. Upgrades increase weapon performance in Left 4 Dead 2.

Obtaining
To use upgrades, simply walk over and press the use button when your crosshair is over the item.

Upgrades
Laser sights: Increase weapon's accuracy

Incendiary Ammo: light your targets on fire

Explosive Ammo: Destory common infected with on shot; Stumble special infected

Physical upgrades

Extra pistol: Inreases ammo capacity and rate of fire

Desert Cobra: Increase pistol damage and accuracy, even when incapacitated