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Games with a distinctive mood, with themes of romance, mystery, or nostalgia

Set in a fictional universe, often (but not always) with fantastic or supernatural elements, alternate worlds, magic and monsters.

Utilizing content created by algorithms rather than human made content. Often utilizes a "seed," a relatively small string that is used to control the randomization algorithm that generates the entire world.

Near infinitely replayable games that usually feature, random generation, perma-death, and brutal difficulty. 

Games that can be played alone

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