
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: Realm Defense is a popular tower defense strategy game for mobile devices. Players build up defenses using various towers and heroes to prevent enemies from reaching the end of a winding path.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API