Talking about Chaos Gate / Squad Command? Chaos Gate as much as I know only has LAN / Hot-Seat. Squad Command... well was never popular to begin with :/
CG has a mission editior and a quick mission thing, the hot seat is unplayable however, I tried to get it working with my friends and we couldn't. It probably is no longer compatible with modern computers at all.
They should contact firaxis. It's been my opinion that since the release of Enemy Unknown that the game could very easily be reskinned, and remodeled... Along with all the little changes it'd need to be a quite worthy successor to chaos gate.
Warmachine Tactics is out, basically an updated, Warmachine skinned version of Chaos Gate. I have to say though, not as fun as I thought it'd be. I don't know, I guess when it comes to video games I've been ruined by years of action play. Still check it out if you're interested in that kind of genre of unit by unit turn based combat faithful(fairly) to the TT rules.
War machine tactics isn't what I want though. More over, Warmachine tactics was a terrible game from what I've gathered. The Xcom reboot, was not.
