Including DLC, micro transaction purchases, etc. If you got a game for free, please also list your non-infinite next best.
For me it’s Team Fortress 2. $100 total spent on hats and the Orange Box back in the day, 4200 hours plus of fun, meaning 2.3¢ AUD per hour. Initially I thought DotA2 would be my best but it turns out I’ve spent a lot more money in that game than I thought…
My worst is God of War: Ragnarok. Bought it full price for $95 AUD, only played 2 hours and hated it, meaning $47.50 AUD per hour.
Best: Minecraft (bought at the Beta price), Counter Strike: Source, Counter Strike Global Offensive (I bought it before it became free), Rome Total War, Anno 1602, Age of Empires 2. I have hundreds of hours in all of these. Technically the last three were bought by my father originally, but I think I re-bought them all on digital platforms later.
Worst: Tom Clancy Division 2 (because it’s shit and full of adverts), Monster Hunter World (because it never worked for me properly), Dragon Age 2 (just didn’t like the style of top down gameplay).