How about a game where the player(s) control exoskeletal armor that is modern with neat weapons that are upgradable. Some types would include projectile cannons (guns) in various sizes, with and without computer assisted targetting, missiles, rockets, and exploding bullets/artillery. The suit would also have armor, and control like an FPS, possibly with additional fire buttons like a world-of-warcraft style skill/cooldown/ammo system. The size could be relevant, with larger ones being as tall as 15 story buildings (or larger) and smaller ones being about twice as large as a man. Smaller would tend to have more acceleration and less ammo/power/weapons/missile signature. Jumping and rockets would also be options, and players could customize their mech in a variety of game settings.

You're talking Global Agenda / Section 8. it might differ in the lore section (since you control remotelly) but I guess it's still a shooty-runny-WTFCOOLDOWN type game. I personally love GA and would like to see another title with some better gameplay and cooler graphics (they focused too much on the mmo aspect and it doesn't feel as epic as it should IMO). Still, I don't get why coop is neglected in modern games. Maybe it's due to the amount of trolls and grief on the interwebs - coop is about trust, and you can't trust a jackass or n00b with your back.

Going back to your game idea, you ever played Metal Fatigue? It had an idea (story wise) that appealed to me - several men manning one robot and fighting in it. That is a game I'd defiinetly play and love. I'm talking something like Allods ship traveling/combat (you needed a player crew to man the ship) or Pirates of the Carribean (allowed several players to man one ship and shoot cannons). There was also one WC3 map called Cruiser Command that I could spend hours with - 5 players inside a big cruiser against a similar team with a battleship. There were engineers, pilots, a captain, fire's on the ship to be extinguished, debris to be cleared, ammo to be created from asteroid minerals... It was perfect and enforced such level of cooperation that griefers didn't even try and join. The game was just too damn good, complexity hit the sweetspot and ballance was great. Come to think of it, think I'll see if it's stil around on WC

Whoops, got sidetracked over there >.> Anyway, the idea is nice, but make the game stand out a bit from the others - let the main goal of each faction be destroying the HQ of the other where the pilots reside. Give weapons that damage the pilot via exoskeleton feedback. Force some mineral gathering to limit the amount of robots and add a spicy RTS element. Enable hacking into enemy robots for brief control. I can bet you had ideas like that for the game, just wanted to voice them