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Like when your dimensions come in three? Try out some of these top 3d games on itch.io.

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

A type of game where the player builds defensive structures to stop waves of enemies from reaching and destroying their base. Towers can be equipped with many kinds of weapons, but generally are unable to move. Resources earned by defeating enemies allow for more towers to be built.