I still wish the League of Legends/RTS gamemode I was talking to balto/cop about was a reality.
The idea starts with you placing on a map, and from that base infantry spawns. The NPCs which spawn can only be controlled in very basic fashion. You tell the troops to patrol an area radius. This of course still won't be limited to how big the Patrol Radius is... But moving on. The infantry's goal is to kill the enemy base and the enemies contraptions. If not given a patrol radius they'll do their own thing and wander around looking for enemies or just doing idle movements. The types of infantry are as followed.
SMG - Armed with SMG's for attacking Players/Other Infantry
RPG - Armed with an RPG which takes out/damages contraptions, fortifications, and strategic bases.
All though basic, the infantry will pour out in mass numbers. No resources, no tickets, no bullcrap... Just a steady slow stream of death which will continue to move around in it's own fashion or under patrol orders from the 'Hero'.
Which brings me to the next part... Who's the Hero? Is it some sort of playermodel with mysterious ways or some evil god which does mind control? No. The 'Hero' is the player. Actually... In RTS terms. The Player is, the hero, the support class, the commander, the engineer... Everything. It's up to the tactics of the player to decide what they want to do. If your unable to follow what I'm saying[being that I'm half awake], the player designs contraptions, fortifications, strategic emplacements, and everything to aid their troops in destroying the enemy base or defending their own.
As it goes though... Some restrictions must be placed! But nothing that will harm the creativity and tactical know how of Garry's Modders. These restrictions will be incredibly basic. You can only spawn props in your base. Heavy props can't be lifted outside your base, and of course... Your contraptions will be timed on spawning. 1 Ton = 2-4 Seconds added on spawn time. This stops players from spawning super mega-death rape machines, and gives the only if any resource-type limit to the game.
What do you build though...? Anything. Like I said earlier... What it takes to win. Wanna para-drop NPCs? You can build an aircraft with a Warmelon-alike launcher system. Wanna use your tanks to move up the lines and attack enemy strong points? You can do it. Wanna do unconventional warfare with landmines? Do it. How about something non-violent... Like making a bridge across a river to give your NPC's a quicker route to the enemy base/frontlines. It can be done.
It's all tactics, and transporting supplies to where needed. Everything is determined by the map, and the creativity of the builder.
Sorry if this isn't exactly WIP... Just making an idea guy suggestion for an ACF gamemode.