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Uses two-dimensional "sprites", 2D images created and used on a flat plane, as opposed to the three-dimensional models or environments found in 3D games.

Games made with ASCII/Enterbrain/Kadokawa Games' RPG Maker series of game engines. Includes, but is not limited to the following:

• RPG Maker 2000
• RPG Maker 2003
• RPG Maker XP
• RPG Maker VX
• RPG Maker VX Ace
• RPG Maker MV
• RPG Maker MZ

Science-fiction. Commonly including things like aliens, advanced technology, and settings of outer space or distant planets. 

The larger universe outside of Earth's atmosphere. Sometimes really, really far outside of it.

Unity is a game engine for 2D, 3D, AR and more