This old school game is about as good at it gets. Games before and after all lack 1 or more things. Total Annihilation with the DLCs is well rounded. Also in Skermish, you can play 10 players on 1 to 10 teams. Shift 8 X will open 10 players in the skirmish players page.
I bought this game back in 1998 when it was game of the year. It has always been my favorite. I had trouble using the original copy I bought so I bought it again on GOG because I thought they would include any patches so it would run well. I had problems but did find a patch that helped. The only problem I am having now is that most of the third level build options are not available. I'm almost done with the ARM missions and still can't access the Aircraft Repair Platform. There seems to be no patches to fix this.
The graphics might be a little dated but the gameplay and depth hold up incredibly well. Music is top knotch and the special effects do well despite their age. No nostalgia required. Pickup TA Escalation mod for this too