Mission 9: New Gettysburg

Conditions for winning

• Destroy all Protoss structures
• All Zerg structures must survive
• Sarah Kerrigan must survive

Conditions for losing

• All your structures are destroyed
• A Zerg structure gets destroyed
• Sarah Kerrigan dies

A large Zerg base is just north of your own base, but you may not attack their buildings, or risk losing the mission. Have two Bunkers per ramp and stock them full of Marines and Firebats with SCVs behind them to repair. Take care with Siege Tanks, as they may destroy a Zerg structure and cost you the entire mission.

Once that's done, make bunkers and secure the bridge to the northeast of you. Also block off the ramp to the south of the bridge. SCVs behind every Bunker is an excellent way to cut back on costs. If you have time, also bunker up just a bit to the east of your bridge, so that neither of the Protoss bases to the northeast and southeast may attack you while you build up a force in peace.

Now, make around 6 Battlecruisers with 6 Wraith support, and have 2 full groups of Marines and Firebats. Also, make a group consisting of 6 Siege Tanks and 6 Goliaths. This is also an oversized force and don't worry if your own force isn't big enough. Tell them all to converge on one base, and then afterwards when you've built new ones to replace losses and repaired your existing units, move in and eliminate the other base to win.