B E T A 1: D E F E N D A N D F O R T I F Y
R E P E L T H E I N V A D E R S
This mission begins at the Alpha Base. You have 10 minutes, so use this time to finish up researching and to begin producing as many powerful units as you can. Recycle older and weaker units to make room for more new ones. At the same time, load up 10 of your heaviest units such as Tanks and Lancer units, and send them on their way when you're through doing what must be done.
When you arrive at the Beta Base, it's under attack. The previous commander did a good job building it. All it really needs is a Repair Facility. Begin to build one in the center of the base, then load up another transport full of reinforcements. Again bring heavy units. It will take seven minutes for the transport to arrive. Beta Base already has some units, so use them to defend the eastern gate while you send the units you brought with you to cover the northern gate. Begin researching the Cannon Laser Designator followed by the APFSDS (Armor Piercing Fin Stabilized Discarding Sabot) Cannon Rounds and the Cannon Auto Loader. These will give your tanks better accuracy and more firepower.
Order all of your units to return for repairs at medium damage. Also begin producing some heavy units. You don't have a lot of power at this base, so be careful on production. Cyborgs also can be produced, and they'll give you some cheap firepower. After reinforcements arrive, bring in another load of heavy units, then a load of Heavy Mortars, followed by a final load of heavy units. You'll probably only be able to get four loads before the transport is shot down by the enemy off-map and out of sight.
S E C U R E T H E A R E A A R O U N D T H E B A S E
After the second load arrives, send a group to the southeast. There will be a few enemy defenses. This is an unmarked enemy LZ and, by securing this area, you can prevent the enemy from dropping off new units here. Once it's yours, leave a few units to guard it and send the rest back to help fight. Keep your northern groups just outside the walls of the base so they can be supported by the defensive structures. When the Mortar group arrives, use it to begin taking out enemy defensives structures north of your base. Target Sensor Towers first because they provide information to the Mortar Pits in the north and northwest.
Once you take out the enemy's southernmost defenses, send a unit down to scout out the northeast. Here you'll find an enemy Oil Rig and some hardpoints. Use the Mortars to lay waste to these, then rebuild an Oil Rig over the Power Source. Now finish off the base in the north. Enemy reinforcements will arrive from the northern map edge. Keep a couple groups there to prevent them from going any further. Then use the Mortars to take out the bunkers and enemy Mortar Pits. When all enemy structures and units have been destroyed, the mission will end.