AresEd is described as 'high-level and fully featured 3D game creation suite. It is Free and Open Source. When it is finished you will be able to make full 3D games without writing any code (although a fallback to the python scripting language will be provided)' and is an app in the Development category. There are more than 25 alternatives to AresEd for a variety of platforms, including Windows, Linux, Mac, iPhone and Online / Web-based. The best alternative is Unity, which is free. Other great apps like AresEd are Unreal Engine (Freemium), GDevelop (Free Personal, Open Source), Wick Editor (Free, Open Source) and RPG Maker (Paid).
Unreal Engine is a professional suite of tools and technologies used for building high-quality games across a range of platforms. Unreal Engine’s rendering architecture enables developers to achieve stunning visuals and also scale elegantly to lower-end systems.
GDevelop is an open-source game making software designed to be used by everyone. Any kind of 2D games can be created with it and no programming skills are required to get started. Logic of games are made using visual events.
The Wick Editor is a free and open-source tool for creating games, animations, and everything in-between. It's designed to be the most accessible tool for creating multimedia projects on the web. Your creations can run on any device with a web browser - that means mobile too.
[Multimedia Fusion 2 has been replaced by Clickteam Fusion 2.5.] Game and software creation has never been easier or quicker than with Clickteam Fusion 2.5! With Fusion 2.5’s amazing event editor system you are able to quickly generate games or apps.
Adventure Game Studio (AGS) - is the IDE and the engine meant for creating and running videogames of adventure (aka "quest") genre. It has potential, although limited, support for other genres as well.