Open-source alternatives to Oolite

Room for Change - Randomly generated action RPG

Cross-platform port of Arx Fatalis, a first-person role-playing game

Open Source J-RPG (Based on the Hero of Allacrost engine)

open source, multiplayer, extensible rogue-like

This repository was moved to GitLab: https://gitlab.com/solarus-games/zsdx

Cataclysm-DDA is an open-world survival game and turn-based roguelike set in a post-apocalyptic world. It functions as a simulation where players manage resources, engage in combat, and handle character progression in an environment where time only advances when the player takes an action. The project includes a procedural world generator that creates randomized, persistent environments and city layouts, ensuring unique maps for every new game session. The simulation covers tactical movement and resource management through turn-based strategy gameplay. It also provides options for personali

Fantasy action RPG using the FLARE engine

Dungeon Crawl: Stone Soup official repository

Egoboo is a working cool 3D dungeon crawling game in the spirit of NetHack for Windows, Linux and Mac.

Exult is a project to recreate Ultima 7 for modern operating systems, using the game's original plot, data, and graphics files.

Free/Libre Action Roleplaying Engine (engine only)

Open source recreation of Daggerfall in the Unity engine

Dungeon Monkey Eternal- Third game in the dungeon monkey series, first written in Python.

Legend of Dragoon decompiled, reverse engineered, and ported to PC/Mac/Linux/Steam Deck

Isometric minimal-code style game at html5 canvas and javascript

NetHack is a roguelike dungeon crawler and ASCII-based role playing game. It is a turn-based adventure game featuring permanent character death and the exploration of randomly generated dungeons. The project serves as a cross-platform game engine designed to be compiled and run across diverse operating systems and hardware architectures. It focuses on retro game preservation by maintaining classic game logic for modern computing environments. The codebase implements procedural content generation for maps and encounters and utilizes a grid-based coordinate system for spatial tracking. Renderi

OpenNox main repository.

Open reimplementation of Might and Magic 6 7 8 game engine

OpenMW is a modern, open-source game engine designed to execute the game Morrowind and its expansions. It serves as a cross-platform game runtime and 3D world renderer, providing a data-driven environment to run game logic and physics with improved stability. The project functions as a game modding framework, utilizing a modular plugin system and an interpreted scripting layer to load external modifications. This architecture allows for the integration of community content, custom textures, and external scripts without altering the base executable code. The engine covers a broad range of cap

Ambermoon rewrite in C#

Ryzom Core is the open-source project related to Ryzom Game. Written in C++, Ryzom Core contains the whole code (client, server, tools) used to make the commercial MMORPG Ryzom. Ryzom Core is a toolkit for the development of massively multiplayer online universes. It provides the base…

Legend of Elya — N64 game with a real 819K-parameter transformer running on the VR4300 MIPS III CPU. Zelda-style dungeon, AI NPCs, byte-level inference at 60 tok/s. Built with libdragon SDK.

Game engine capable of running KotOR and TSL

Space Station 14 is a C# multiplayer game and roleplay simulation framework. It is built upon an Entity-Component-System (ECS) game engine that separates logic into systems and data into components to manage complex entity interactions. The project functions as a grid-based physics simulator with a YAML data-driven prototype system for defining game objects. The project features a specialized 2D sprite rendering engine that maps server-side appearance data to client-side shaders. It implements a networking model with client-side prediction and dirty-flagged state synchronization to reduce inp

2D Game

Veloren is an open-source multiplayer RPG featuring a voxel-based action adventure in a procedurally generated fantasy world. It is built upon a voxel game engine that supports 3D rendering via Vulkan and Metal, utilizing a procedural world generator to create geography and ecosystems based on erosion algorithms and temperature maps. The project is distinguished by a sandboxed plugin system using WebAssembly, which allows for the addition of new game logic and equipment without recompiling the core engine. It also features a dedicated game server architecture designed to synchronize state, ma