Paint War 2 continues the style of the series. You only control 1 soldier this time and you can unlock new weapons as the game progresses.
Paintwar 3: The North Isle was a fangame to the series that inspired me – Cannon Fodder. It was never finished. It plays more like Paintball War 1 and has an overworld map with “first person” sniper missions.
Paintwar 4: Crossfire has randomly generated levels and upgradeable stats and weapons.