Magic The Gathering
Magic the gathering Commander mode is what science the scattering is based off of. The main issue with magic the gathering is that their online modes
like Arena and MTGO. Arena is quite good and does give a decently fair chance that you can get good cards and have a good time playing the game however
it does require money at the highest levels just like the card IRL version of magic. MTGO however is only for "pros" while you can play they only give you the cheapest cards
and requires hundreds of dollars to be competitive and as such this is the only online format that tournaments for cash are played.
Other Competitors
There are quite a few other card games but nobody else plays the same most other trading card games don't support a mode like commander or even have alternate modes of play.