I don't remember quite well, but it was round 30 I think and a panzer blitz happened. I survived due to my badass defense. Then a few waves passed and I died out.
Flawless Stradegy : Line your soldiers in an order like 2 sideways brackets ":" on each side. Get a signaler and then have all your next units paratroopers. I am better off with this plan than with any other. Also paratroopers have weapons so you don't have to upgrade them.
Awesome game, but I have some recommendations.
You should add some missions where you have to protect a town. Maybe if all the town buildings are ruined, you lose. You should also add some citizen grade buildings in survival mode. I like to make my own "campaign" missions in survival mode, and they include town defense, so maybe add houses. The houses can also shelter soldiers in them. I also think it would be nice if you add a citizen team, to go in the houses, if you add them, and trenches. They can just hold citizen grade weapons and maybe not look like soldiers. Just some recommendations.
I found a severe bug, at least for Mac. I couldn't stop moving or remove my checklist, and when I went down to report it I couldn't scroll down, and when the owner came home she wasn't doing anything.