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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.

Contains lesbian, gay, bisexual, and/or transgender characters or plot lines.

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. 

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