20: Mid-Boss Revenge

You have to deal with the giant flying shark once again. This time, you’ll have to deal with two of them. For this stage, I suggest bringing in the Rocketeer and Recon units. As soon as the battle starts, stay near your base for the meantime as it won’t be a good idea to spread out your units early in the game. Build a healthgun in the middle and preferably two blamwitzers. Once the battle starts and you see the flying shark, use your Recon and Rocketeers’ abilities to target it.

Your base has a mounted rocket tower, which you can change to an AA battery if you want. Don’t bother building more towers outside your defense line since the powerful purple skulls will just destroy them with ease. Once you’ve fully upgraded everything inside your defense line, you can start putting in new towers nearby but be prepared for some expensive repair costs. Like the last few missions in the game, if you’re having difficulties, you should grind your heroes to improve their abilities, especially the Rocketeer’s Anti-Air ability.