[function_seven]

Sorry for self-reply , but hopefully someone out there can point me to some similar tower-defense games? Everything I see on the app store now is bloated with graphics or IAP and shitty gameplay. If you're familiar with the GeoDefense games[0], you know what I'm talking about.

[0] http://www.criticalthoughtgames.com/geodefense.html

[twic]

It's not exactly tower defence, although i think it's close, but i am currently recovering from a pretty serious Bad North obsession:

https://www.badnorth.com/

You defend procedurally generated islands from viking hordes, but rather than towers, you use up to four squads of soldiers from an army you grow over dozens of islands. The art and sound design are lovely, and the gameplay is engrossing. Each island takes a few minutes to play, and a campaign lasts a few hours.

It's something like 5 dollars on iOS and Android, and has no ads or IAP.

[anchpop]

Mindustry and Infinitode are both lots of fun

[jakear]

+1 for Mindustry. Factorio with more tower defense emphasis. And FOSS!