S!X is a small Tower defense game where you keep the army you buy and expand it with the credits you earn if you win a round.

All units upgrade their levels the more kills they make. You can buy perks, either at your Head Quarters or during playing a round.

I published this once in 2016, but couldn't finish it at that time. 

Linux version untested.

Have fun and let me know what you think in the comments.

Cheers R.