This is pretty fun, but the same strategy works for ever stage, more or less. Here's my strategy for the last stage:
- Wait till you have enough to buy your first scrapyard
- Crank out farmers when they cross the bridge with zombies or hunters
- Get your next few scrapyards up, but crank out hillbillies when the Witches start coming. If they are attack your trailer, they'll ignore your units.
- When they start sending the big, fat ones out, call your Harvester when they cross the bridge. You want it to be a buffer.
- Once you have max scrapyards, get your Farmhouse out. Get a few Farmers out, then get a trailer out and get out 5 farmers.
- You'll probably need to Harvester again at this point. Use the time to get to 20 pop and get 10 farmers out.
- Get the garage out and try to have at least 2-3 Survivialists out. If they call fat guys out, Air Strike the area.
- If your available Yee-Haw ever hits 7k or more, go ahead and send out an Angry mob. The extra Farmers help lots and take no cap.
- Once you have the Garage out, get two more Trailers out. Ether get more Survivalists or more Farmers.
- Once you have 30 cap worth of Survivalists and Farmers out, just use your Yee-haw as needed. You'll be done in no time.
Here's my times!
Level 1 - 4:53
Level 2 - 7:14.8
Level 3 - 8:48.7
Level 4 - 8:48.8