18: Street Rats Bazaar

Campaign

Waves: 9

Starting Energy: 1500

Lives: 20

There are two exits to the east that you must protect and a teleporter. The teleporter exit is connected to the shorter road to the southeast leading to the checkpoint. In this stage, you have to deal with a new annoying enemy. The Ballista. This droid can lock on to any of your hero or infantry from a distance and fire an artillery shot that will take a few seconds to shoot. This will further divert your attention since you have to move your hero(es) and change the waypoint of your soldiers to get them out of the Ballista's splash damage. Later in the wave, you'll have to deal with the Mirage, another stealth unit that will leave behind teleporters to summon reinforcements.

This battle may drag on so carefully clear more spots and concentrate your defenses near the checkpoints. In the later waves, the spawn point near the northeastern checkpoint will be activated and more enemies will appear from there. The last wave is very hectic with all different types of enemies coming at you at the same time. If you have a Tesla charge left, don't hesitate to use it. Use airstrikes as well when the enemies are congregated near to each other.

Veteran

Waves: 6

Starting Energy: 1350

Lives: 1

In this mission, you can only use Infantry and MG towers. There are several blocked tower slots so make sure you choose a defensible position where you can concentrate your forces and towers. Alternately concentrate your fire on the ballistas and enforcers. If you have access to both Railgun and Mini-gun upgrades for your MG tower, buy them as well. In the last wave, Juggernauts will join the fray. You know how troublesome and resilient they are so might as well use Tesla charges or airstrikes to take them out.

Spec Ops

Spec Ops

Waves: 1

Starting Energy: 1650

Lives: 1

Use the same tactics as what you did in the campaign. Establish your defenses near the checkpoint and place laser towers around the curves of the path for good coverage. Transform one into a quad-beam tower then place at least two infantry towers near the checkpoint. It's recommended to put additional laser and MG towers nearby to deal with the pesky heavily shielded enemies. As usual, don't hesitate to use your tesla charges and airstrikes to eradicate a large group of enemies, especially if there are juggernauts in the fray.