15: Mouldy Grotto

This is a very small map and you’ll start with very small money. Since you’ll be fighting up close, you should use your bulky heroes like the Assault, Bombardier, or Rocketeer. You can use a scientist or saboteur to guard the base if you want as well. Beware of the enemy spawn point near the base as well. For starters, place the soldiers near the spawn point then build a healthgun in the chokepoint. You’ll be forced to build in the limited slots behind the chokepoint since building towers in the other spots can be costly since they’ll be disabled most of the time because of their isolated positions. Also, your HQ has a Shieldemitter equipped. Make sure to fully upgrade it to give it fast shield-generating capabilities and to give it as much range as possible to protect your towers near the chokepoint.