The original Total Annihilation has very powerful static defenses as well. Different types with different ranges that you can overlap for maximum destruction of incoming enemies. There is something hugely satisfying with seeing a huge approaching mass of robots and vehicles being thinned out by long range heavy plasma batteries that are hitting in a scattered pattern throughout their ranks with powerful area effect, then whatever is left of them makes it close enough being engaged by laser turrets.
Good thing Beyond All Reason is such a fantastic spiritual successor and is free and open source!!
https://www.beyondallreason.info/
There are co-op modes in BAR too where you can turtle co-op.
It is a very solid game. I wish someone made a BAR mod that changed all the units and buildings names back to their original ones.
