
Description: The Castle Game Engine is a cross-platform, open source game engine for 2D and 3D games. It supports multiple programming languages and can export games to many platforms including Windows, macOS, Linux, Android, iOS, and web browsers.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Atavism Online Engine is a software engine designed specifically for developing and operating massively multiplayer online games (MMOs). It handles features like network messaging, player logins, 3D rendering, and more so developers can focus on creating game content.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API