Revolution Idle

Revolution Idle is a free idle game that starts with circles filling up and grows into numbers too big to read. Color spectrums speed up the filling, and prestiging raises your multipliers and your exponent, so every run goes faster than the last. At about 1.79e308 you hit Infinity, which opens generators, challenges and stars that boost every run after that. Eternity then resets it all again so you can go further still. New systems keep unlocking one step at a time. Automation covers nearly everything, and a macro builder lets you write your own automation strategies. There are more than 520 achievements that give real bonuses, offline progress while you're away, daily rewards and a global leaderboard. It's on PC, Android and iOS with progress synced across them, and it gets regular updates. Nu Games and Oni Gaming make it, and the Steam page cites more than 2 million players and 130,000 people on Discord. A tutorial covers the basics and an in-game wiki handles the rest, so it works for newcomers and for players who want a very deep idle game.