Amazon announced its free, cross-platform, 3D game engine called Lumberyard. This engine is based on Crytek’s famous CryEngine. Create the highest-quality games, connect your games to the vast compute and storage of the AWS Cloud, and engage fans on Twitch. Includes full source.
Lumberyard provide a collection of game ready assets and pre-built features that can be used to quickly start new projects. You can use these assets to prototype using Lumberyard, or just to test Lumberyard features.
Lumberyard already includes samples to help you get started, but it also provide additional ready-to-use art assets and code so that you can use as examples and help you prototype your game more quickly.