Warzone 2100 (you can download for free as it is an old PC game that went GPL)

gets more on the nose by the day

a search engine for the gemini network protocol

https://en.wikipedia.org/wiki/Gemini_(protocol)

gemini://gemplex.space/search

That is just the gateway drug to bootstrapping.

Check out https://github.com/fosslinux/live-bootstrap

if you want the real hard stuff.

Really looking forward to seeing this packaged in Guix