Just make it wave defense like opoluents awesome mod. The attackers don’t have buildings just spawn points. Maybe kills equals points and points can be used to repair buildings or build defense (like turrets). Aliens vs humans should be the main experience. Maybe if you want people to also spawn as attackers attackers kill points allow spawning bigger units to attack with. If you want victory maybe set number of waves.
#Turn siege into survival mode
hoary osprey
Right now siege is cool once but it just feels like a restricted strategy light on a small map. Not different enough to be its own thing. Maybe move current siege as just a scenario
If you turn it to survival wave defense this would be the FPS centric game mode and strategy is the RTS.