Open Source Scala Games

lichess.org (also known as Lila - lichess in Scala) is a free and open source chess server written in Scala 2.13 that focuses on real time gameplay and ease of use. It’s where countless chess players and chess enthusiasts can gather and watch or play from a selection of over a million games every day, analyze games, learn and improve their playing. lichess is equipped with a search engine, computer analysis, tournaments, exhibitions, a mobile app, a shared analysis board, and so much more. Thanks to its large active community, the UI is available in more than 130 different languages. lichess is one of the most popular chess websites in the world and remains totally free and ad-free. Visit https://lichess.org today to know more and see what it’s about!

OpenComputers is a Minecraft mod that adds programmable computers and robots to the game. The built-in computer implementation uses Lua 5.2 and is fully persistent. This means programs will continue running across reloads. OpenComputers is a mod that adds computers and robots into the game, which can be programmed in Lua 5.3. It takes ideas from a couple of other mods such as ComputerCraft, StevesCarts and Modular Powersuits to create something new and interesting.

A 2d rpg game engine created to be ease of use. Built in Scala and libgdx. Also our community forums http://rpgboss.forumatic.com

The JASI library provides an architecture based on a simulation kernel and elementary classes for simulation elements and event to build event-based simulation systems in Java.

An Interactive Fiction Player written for Java Virtual Machine. It implements the Z-machine and Glulx specifications and can be used either standalone or as an applet. The Z-Code/Glulx interpreter runs adventures made by Infocom and contemporary Inte

GhostTrap is a classic 3-in-a-row puzzle game (like Zookeeper / Bejuweled) written in the Scala programming language on top of the JVM

IGS Go client for Windows Mobile and Android devices

Lila is the backend codebase powering Lichess, a free, open-source online chess server with millions of users. The architecture handles real-time games, puzzles, tournaments, correspondence chess, streaming, and user profiles, scaling to thousands of simultaneous matches. The system uses functional programming principles (in Scala) to maintain reliability—state transitions, clock management, game rules, and move validation are deterministic, reducing synchronization errors. Lila also integrates rating systems (e.g. Glicko), puzzles generation, AI opponents, and cheat detection systems. A real-time socket layer (WebSocket) streams move updates, chat, and broadcast events, while REST APIs support client and bot integrations. Supporting features like database schema migrations, analytics, moderation tools, and backups are woven into the platform so the community can contribute and host clubs/variants (Chess960, King of the Hill, etc.).

This is the reimplementation of the old Snake Battle game by Russian software company Gamos. Multiplayer game where the player have to "train" a Battle Python. After that he enters a tournament and fights with other pythons.

This project is no longer hosted on sourceforge, please go to https://github.com/jodersky/sims instead. A library for rigid body simulation written in Scala. This project was created under the terms of a one-year project at school (Gymnase de Burier). Another program for testing and visualizing SiMS, Graphyx, is included.

This project has been renamed to Tetris Analyzer and moved to GitHub. All code has not been moved from here to GitHub, so that's why Tetris AI is not removed.

Javascript platform for tile map based single/multiplayer games with both off-line and server-based play modes. Try it out right away at http://tilescape.hg.sf.net/hgweb/tilescape/raw-file/tip/js/game.html