Hello Mr Human. EXP is a very old sciency fiction RPG. It lives free of charge on the intertubes at expgame.com The rule sets are on the subdomain rules.expgame.com
The premise is that all technology can happen at once and has the subtitle The game of Technological chaos. There is very little mythos, as it comes from an before modules. It is being actively developed and locally play tested by the solo dev.