Cookie Clicker
http://store.steampowered.com/app/1454400
Cookie Clicker is a game about making an absurd amount of cookies. To help you in this endeavor, you will recruit a wide variety of helpful cookie makers, like friendly Grandmas, Farms, Factories, and otherworldly Portals. Cookie Clicker was originally released in 2013, but has been very actively developed since then. If you played it before, try it again to see all the new features! Collect cookies and spend them to earn even more cookies Over 600+ upgrades Over 500+ Achievements Pet your dragon Mini-games Unlock heavenly perma-upgrades Cloud saving (no more deleting cookies by accident) Music by C418 Play community-made mods through Steam workshop
And a little extra 