Cookie Clicker is an idle game at its core, meaning that players don't have to be constantly watching the screen to get the most out of it. With enough upgrades, the cookies literally make themselves.

Cookie Clicker Permanent Upgrade Slots are powerful upgrades that let players keep the benefits of an upgrade through multiple playthroughs (and multiple Prestige levels). The first Permanent ...

But that's changed now, and a mere day after its launch, Cookie Clicker has an 'Overwhelmingly Positive' rating on Steam, putting it in the same vaunted category as Half-Life 2 and Portal 2.

Playsaurus is promising more than 600 upgrades in Cookie Clicker, as well as the ability to "pet your dragon." For those unfamiliar, you click the cookie to make more cookies.

Despite not meaning to be fun, Cookie Clicker took off. There are now hundreds of "Idler" games listed on Steam, all following the same format laid down by Orteil so many years ago.