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Stripping back the unnecessary and focusing on the essential. Minimalist games often rely on simple graphics, basic colors, and straightforward mechanics to convey their core gameplay experience. They often prioritize gameplay and user interaction over complex narratives or detailed graphics, providing a refined and uncluttered experience. They may feature limited interfaces, reduced controls, or a focus on a single mechanic or concept.

Games that can be played using only a mouse or other pointing device, and don't require any other input.

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

Focused on using its text, moreso than its visuals or audio, to tell the bulk of its story/plot. (Still can have great audio and visuals, though!)