I have found myself incurably addicted to the surf mini game found within Counter Strike Source. It is a $10 game that is over 20 years old and I have over 600 hours in it already with still a lot to learn. The skill cap is crazy high and it takes so long to master it but when you start getting decent, it’s so incredibly satisfying to hit a smooth run and beat your previous PB. You can even compete against other players in your country or globally to earn bragging rights for being one of the best!