[twillight]

Total Annihilation - Against Arm (Core Campaign walkthrough)

1: you get a bunch of troops with no chance to repair. Your goal is to climb up to your Commander (paralyzed, won't be harmed), and this means destroying all enemy. Go upward, and keep your troops in one bunch. Use cover if possible to face only 1 enemy at a time releasing full ammo on that one. Run up ramps as fast as possible, so your shots won't stuck.

2: there are 3 problems on this level: the initial arm arrivals have heavy armor, and/or very fast. So you'll need your Commander to shoot them off. Second: you can not have any repair for your Commander, so best bet is to make a base, clear the outside patrols with your commander, than back off. During this build vehicles in your plant to assault. Third and last problem is the lack of radar. So the last hiding enemy to find is problematic (build scouts and place them systematically, sooner or later they'll find it).

3: Don't mind the attacking Arm, just build like 3 solar panel, than go after them. Walk across the transport-route and destroy the arm units along it. Do not mind any Core unit aside your commander, you can not control them. When you finished in the tunnel build an energy storage, some additional solar panel/mine, and finish the map.

4: I bet you could make an entire army, but just make some basic protection for your energy-supply, and send in the commander to clean the map. Fortunately from now on you have both repair and radar.

5: So, it seems the resource (metal) production will be a problem as advancing, unlike for the other campaign. Here we also start in the middle of the map, AND the enemy has airforce. What we have to destroy.
The aircraft goes down fast for some missile tower, the real annoyance is the source of metal is close to the enemy, which especially likes to ambush your radars. Still not hard.

6: An annoying level because you can't just walk in and win.
At the start Arm has mines all over the hugh map, and will rebuild them constantly, AND will produce a hugh number of fast&cheap units which'll you need the commander to lead against.
So build a basic base and an airport on which build fighters ASAP. Than go out and conquer some territory, aka build your own couple of mines, ever fortifying your new bases with zounds (like 10) missile towers (whatever their name is on this side).
After you have a foothold, send your planes to destroy mines to cut the resources of the enemy (yes, this time this is how it goes). Your planes will be devastated after a while but who cares. Under that time build 3-4 more airports in which start producing a mix of fighters and bombers. None of them are really good, but that's life. You should use them to eliminate the frech mines, plus the enemy constructors, than make them patrol high enough for the entire map preventing the enemy from rebuilding those mines. The map is too hugh to build your own mines there, and probably enemy aircratft or something would cut them down anyway.
When you feel confident enough make your planes assault the enemy, concentrating on the unit-production buildings. If you manage to destroy those buildings, there'll be no more things to build anything for the enemy, so your commander can walk in finally and make you win.