defold.com
A free 2D engine developed by King. Very fast and small, uses Lua for scripting.
Pretty sure everything is indie on itch.io but just in case you want something extra indie.
Suggest updated description
Science-fiction. Commonly including things like aliens, advanced technology, and settings of outer space or distant planets.
Projects tagged with the following aliases will automatically show up on this page:
sci-fi
Explore games made with Defold tagged Indie and Sci-fi on itch.io · Upload your games made with Defold to itch.io to have them show up here.
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