I thought of a map concept where you would basically be an assault team, infiltrating a base controled by the MVM bots. The scenario could be like, the mercs are raiding the MVM robot's factory at night. We could have it scale difficulty as the team goes through the level, example would be like they happen upon the section of the facility that produces the sentry busters. There would be guard bots around the whole facility, or even sentry guns. The team objective would be to eliminate the obstacles to reach the final objective; which is to blow up the facility (kinda like the payload finale). Like they need to open a gate to go to another section; but opening it summons some bots and it takes X seconds to open so you have to fight a few waves of bots until it's all the way open. There could be a scene where you're caught in an elevator (we could use a scrolling texture to fake that they're moving) and the team has to kill all the bots before they can get off the elevator. Probably wouldn't want respawns as they are usually; the team has to reach a checkpoint to revive the dead people, or have a medic to keep people alive and revive them. Each section of the factory could have an armoy of sorts for the bots to pickup weapons; which would allow us to include upgrades into the "story". The hardest part i think would be making it balanced. Like trying to prevent crazy exploits but also not require a fixed meta to win. I would want the mission to last ~20-30 minutes so it's engaging but not tedious. To pull off this concept; i think we would need to write a story to follow, obvously the map layout itself, and probably custom voice lines to actually instruct the team to do things; kind of like how HL2 does it.