Forgot game name, can you remember?

Hi,

I used to play this game that was like an all out war, and each side had to capture a zone as its objective. The teams were neon blue and neon red, and there were multiple classes for players to choose from. Some included like a medic, a builder, assault, etc. The most vivid thing i could remember was the fact that players could build these like space laser type of cannons that could launch explosives from across the map. It was a great game, and would appreciate any recommendations.