Here comes the algorithm - Valve updating Steam to show different games for discounts and events
(www.gamingonlinux.com)
Astrox Imperium = Eve Offline (it's literally a single player EvE Online clone)
Schedule 1 (Drug dealer shop sim)
Roadside Research (Gas Station run by inquisitive aliens sim)
Vintage Story (Minecraft for adults, the chisel will change your life.) (Not Available On Steam)
Workers and Resources: Soviet Republic (possibly the most in depth city builder on the market)
I can suggest a ton more, but I'm trying to stay on the Indy dev side of things.