I think No Com Reclaim is now part of the base game. If you are referring to asteroids that create a planet wide shock wave instead of destroying the planet, that mod was only operational when you played on the Community Dedicated Server
It wasn't a mod, that was a direct modification of the server source code which would had become a core feature. Community Dedicated Server was running a custom version with experimental features.
I am so glad this commander reclaim has been disabled by Mikey and it is still disabled. Commander reclaim feels legit, but it hurts gameplay...