I have been playing Melvor Idle for years now and loving it. It's like runescape without the gameplay. It brings back memories of the good old days of runescape botting. If you're a fan of watching number go up then it's worth a try.

It does have a premium version and DLCs but it's a good value and only a one time payment. I still haven't bought any of the DLCs because I'm waiting until I 100% the base game so I've gotten over a year of entertainment for $10.