
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: Tower Duel is a 1v1 multiplayer battle game for iOS and Android devices where players construct towers to attack their opponent's towers and base. The goal is to destroy the enemy's towers and base before they destroy yours in this real-time strategy game.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API