Win by Ground
First create suitable base defense's very quickly by having loads a energy an metal and getting the commander to build the sentinels, guardians and defenders (using the 'commander build other buildings cheat').
build hundreds of peewee's or instigators( depending on side) and when u r at about 50 start building fido's or reaper tanks, also in mass produce (u may need high resources and try to have more than one vehicle or kbot factory building the units, its quicker.
Start letting about 10 of the peewee's or instigator's go and when they die send another 10. You should slowly start to degrade the enemy's base by doing this. When you come to your last 10 small units, u should have a large amount of the bigger and better units, so send them all in a massive wave remembering to get the fastest units to guard the slowest ones and controlling the slower ones into the enemy base.
You should wreak havoc, but if the base is very strong, you may need some backup units plus the commander to go in there and finish them off.
Win by sea
First start off on your island or wherever u r and build the basic metal mines. build about 1 solar energy. then build a sea factory and using the commanders aid for speed, build a con. ship. use this ship and the 'commander build other buildings cheat' to build loads a tidal wave generators, because no matter how much energy they produce even if its +15 they don't take up valuable space on land. Then after getting loads a energy, build a kbot lab and then an advanced kbot lab.
start chugging out skeeter's from the shipyard for anti air protection.
build an adv. con. kbot and with the help of the commander reclaim the old metal mines and exchange them for moho mines, in between this make 1 or 2 guardians in case of a naval attack. Your aiming for about +30.0 of metal to be produced, so build metal makers as well.
Energy will probably become a problem because of the metal makers so either build loads more tidal power or build a fusion plant (takes loads a time though). When you have well over +1000 energy and +25.0 metal, build a few defensive structures like torpedo launchers, etc. Air defense shouldn't be much of a problem as u should have around 30 skeeters.
Start building advanced and basic battle ships, cruisers and subs not forgetting the missile rangers as well.
take your time. If u get attacked add more guardians and if u have got fog-of-war fly fighter or scout planes around ur island so that the guardians will self-target. An annihilator will help you greatly against ships (the doomsday machine is crap) but will be targeted like nothing else.
when u reach about 50-100 naval units send them plus a load of scout planes guarding them to the enemy base.
Everything will work together. The Cruisers, battleships and destroyers will target land units spotted by the 20 or so scout planes, the missile ships and the scout ships will keep air attack away (The core warlord battleship is a good brawler and rapier killer) and the subs will keep other subs off your back. (If your subs are destroyed your cruisers and destroyers should take care of them (although not as well).
try to get your ships to fire at defenses first like plasma batteries, SAM sites and torpedo launchers, then concentrate on factories. You should completely cripple them.
If the commander shows up, move most of your ships away and leave behind a few subs and cruisers to sacrifice themselves for the death of the enemy commander.
Win by air
U need a fully fledged base complete with dragons teeth right around the edge, crawling bombs mining the area, all kinds of defense towers all around your base and u need to build it all very quickly. For air units, u need energy more than metal to build them, so u will need a couple of fusion plants. build four advanced aircraft plants and on one of them, get the commander to guard it. He will now help build anything that you select on the build menu automatically. on the other three, assign three con. kbots EACH. These will do the same. In the first factory select 30 stealth fighters, the 2nd 25 rapiers, the 3rd 25 rapiers and the fourth one with 40 bombers. u need to have enough space in your base to fit all these in plus around 30 landing pads (build these while your aircraft r being built). Keep off all attack and try to keep your aircraft that has been built in mint condition by setting their attack stances to 'hold fire' (do this on the factory settings). When all is ready, send the stealth's and the first 25 rapiers. These will show up the enemy air defense sites and factory's get them to try and kill them. While they r doing this, attack vast amounts of their base with the rest of your aircraft which should finish them off. If u spot the commander, get about 10 of your gunship or rapiers to fire at him and kill him. With the landing pads, damaged aircraft will come back to use them and then go right back into the fray.
Make Aircraft Hover
To make aircraft hover in Total Annihilation first get a plane (peepers or finks work well). Now land the plane and once it is landed tell it to patrol the spot DIRECTLY NEXT TO IT. Just use the patrol icon and move it around until you see a good spot that's touching the plane. If done correctly the plane will get up and if the patrol point is close enough will hover over it. You may find this does not work with larger planes, such as ers. However there is an alternative that works for all. Just lift the plane off and when it gets to the spot right before it starts to land, pause the game. While it is paused, tell the plane to patrol at the place that it is hovering over. It will be confused and stay in one place in the air. Want stationary anti-air that is not vulnerable to gunship or ers? Just get a fighter to hover on the AA lacking area. I find this is more effective that patrolling because sometimes in patrolling the plane is too far away in its patrol route to see the opposing aircraft. Have fun hovering brawlers off the screen. When an enemy unit gets to close to the edge... Boom! And by the time he realizes that you killed that can/bulldog/other unit that you don't wish to be hopelessly slaughtered, you're brawlers will go back to hovering off screen. In order to get them there, you have to have good timing. Figure out how far off you want the planes to hover, and send them over there. You must guess when to press the patrol button because it must be exactly right. I hope you have fun using this neat trick.