Geometric Invasion: Tower Defense is an Android game developed by Tiakat. It is a fast-paced and classic style tower defense game that will test your strategic thinking and resource management skills. The game features five tactically distinct towers, 16 enemies with unique features, and a large selection of maps to challenge all skill levels. With 48 maps, some of which are quite difficult, this game will keep you entertained for hours.

The game is completely free, with no payments required. The only way to beat this game is through skill. The latest version 1.6 has even more maps to explore. So, if you're looking for a challenging and rewarding tower defense game, give Geometric Invasion: Tower Defense a try.