Open Source Game Engines

VASSAL is a game engine for creating electronic versions of traditional board and card games. It provides support for game piece rendering and interaction, and supports play by email or over a live connection.

Crimild Engine is an open source scene graph based engine which purpose is to fulfil the high-performance requirements of typical multi-platform two and tridimensional multimedia projects, like games, simulations and virtual reality.

2D graphic engine written in SDL and Perl

LASengine is a powerful game engine to create 2D point-and-click adventure games. It uses LUA as the scripting tool.

MAP is a software that allows to create and play text adventures. Text adventure or "interactive fiction" is software simulating environments in which players use text commands to control characters and influence the environment. They were among the first computer games. MAP includes tools to create the adventure and a runner that allows to play it. Source is available and open so both the runner and tools can be modified to fit the needs or style for each adventure/creator.

PyCAPGE (Python Classic Adventure Point and Click Game Engine) is a versatile, open-source framework designed for creating retro-style 2D graphic adventures using Python and Pygame. Inspired by the golden age of SCUMM games, it features a customizable 9-verb interface and robust inventory management. Key features include a Scene Manager supporting parallax scrolling, walk-behind masks, and depth-based character scaling. It implements intelligent Pathfinding to navigate complex environments automatically. The engine natively supports Multi-Character gameplay, allowing dynamic switching between protagonists. Developers can build rich narratives using the branching Dialogue System and a Cutscene Manager for scripted events. The architecture is data-driven: texts and definitions are separated into YAML files for easy localization. Includes a JSON Save/Load system and debug console.