Free games like Cookie Clicker

Clicker Heroes is one of the best-known idle games: click monsters to earn gold, hire heroes who keep fighting when you stop clicking, and ascend to start over with powerful Ancients. Mr. Mine is a relaxing idle mining game where your miners dig deeper and deeper into the Earth, and Grindcraft turns gathering and crafting into a clicking game that unlocks new worlds.

For numbers that really explode, try Antimatter Dimensions, where every dimension produces the one below it and new layers keep changing the rules long after you pass infinity. Evolve is one of the most detailed incremental games around: guide life from a single strand of RNA to a space-faring civilisation, then reset with new traits.

All five games are free and run in your browser. Idle games are easy to pick up and perfect to check in on throughout the day.