
Description: Gemcraft Zero is a free tower defense action strategy game. Players build mazes and place towers to defend against waves of monsters. The goal is to harvest monster gems to craft powerful spells and upgrades.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Over The Top Tower Defence is a tower defense game with a unique take on the genre. It features colorful cartoon graphics, various upgrade paths for towers, and challenging levels. The goal is to strategically place towers to prevent increasingly difficult waves of enemies from reaching the end.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API