The Mean Streets

Step 1: Begin by placing Gatling Towers one tile apart at the front of the second set of usable squares. Once you have $5, fill in the missing bottom spot. After the first wave, sell the bottom four towers and use the funds to buy a Spark Tower placed in front of the sandbags. This will help kill incoming waves and start combos.

Step 2: With $30, add a second Spark Tower to the next sandbag tile below. As cash accumulates, immediately start replacing the sold Gatling Towers to rebuild your defensive wall. Fill in every vertical tile with Gatling Towers and place a third Spark Tower at the southernmost sandbag placement.

Step 3: When runners breach your defenses, wait for the farthest one to reach the screen's edge. Pause the game and use the Airstrike ability for a significant boost in numbers and cash. The key now is to focus solely on adding and upgrading Spark Towers.

Step 4: Feel free to use any available items, especially if aiming for a high score. Space out your next few Spark Towers, but keep them relatively close to the ones positioned by the sandbags.

Step 5: Set up additional Spark Towers in a row on the tiles closest to the runners' entrance. When the next wave arrives, hit the Airstrike button for a guaranteed victory and three stars.