Open SLUDGE consists of an engine and development kit for the creation of 2D adventure games. Originally shareware, then freeware and now open source.

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Tags: ADVENTURE, GAMEMAKER, open, sludge

JavaScript Graphic Adventure Maker is an open source Javascript game engine focused on classic graphical point-and-click adventure games.

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Tags: ADVENTURE, BROWSER, GAMEMAKER, graphic, javascript, maker

SGDK2 is an integrated development environment designed for developing multi-layer scrolling tile-based games. It includes integrated map editor, graphics editor, code editor (although coding is not required), and much more.

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Tags: dev, development, GAMEMAKER, kit, scrolling

Paintown is a 2d side scrolling beatem-up engine. Paintown supports game styles similar to the Sega Genesis game, Streets of Rage 2, as well as traditional 1 vs 1 fighting games through an implementation of MUGEN. Many aspects of Paintown are customizable, from the menu system to the levels and players that can be controlled. Paintown is highly portable. So far Paintown can run on Windows, OSX, Linux, BSD, Wii, PS3, Android and other systems.

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Tags: engine, Fighting, GAMEMAKER, mugen, Paintown

Room Escape Maker is an online application to create Escape The Room games. Make challenging casual point and click games with puzzles, hidden objects, safes with combination locks, and much more.

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Tags: BROWSER, editor, escape, flash, GAMEMAKER, maker, room

Novashell is a high-level 2D game maker that tries to handle all the hard work behind the scenes allowing you to focus on making games using path finding, dialog, persistent dynamically sized maps with construction/deconstruction, save anywhere, and especially features that adventure and RPG type games would use. It’s also built to allow easy sharing of games you make and modding of them. The underlying concept is everything is cut and pastable and can be added and removed even during play.

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Tags: creation, game, GAMEMAKER, novashell, opensource, RPG

Proton SDK (aka p+) is a free and open source component based C++ framework with its own touch-optimized GUI system that is optimized for GL/GLES based cross-platform app/game development. Both 2D and 3D apps (using the included but optional Irrlicht 3D engine) are supported.

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Tags: GAMEMAKER, programming, proton, sdk

2D game engine and level editor.

Frank Engine is an object oriented game development framework written in C++. The purpose is to be a fun and fast to create large open world 2D games. Everything necessary to create a fully featured game is included: physics (Box2D), rendering (DirectX), level editor, dynamic lighting, particle system, sound, music (Ogg Vorbis), gamepad input, GUI, and debug console. The code is fairly well documented and includes a simple starter project build on.

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Tags: code, development, engine, frank, GAMEMAKER, sdk, source

Dungeon Craftis an adventure creator that is based on the AD&D gaming system.

Dungeon Craft is an effort to develop an RPG and editor that mimics SSI’s Forgotten Realms Unlimited Adventures (FRUA). A few improvements have been made over the original FRUA, 16/24/32-bit color, more levels allowed, editable items/monsters/spells, and the resulting design includes the game executable so that each design is playable without the editor. Other differences exist, but Developer have attempted to duplicate FRUA/Gold Box behavior as much as possible. Of course, suggested improvements have a good chance of making their way into the source code.

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Tags: Craft, create, dragons, dungeon, fantasy, GAMEMAKER, pool, radiance, RPG, waterdeep

Vassal is a game engine for building and playing online adaptations of board games and card games. Play live on the Internet or by email. Vassal runs on all platforms, and is free, open-source software. This software requires java to run.

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Tags: allies, axis, battlefleet, BattleStar, board, engine, galactica, game, GAMEMAKER, gothic, java, RPG, strategy, triple, turn, vassal, warhammer, wh40k