Well my bad, because I assumed that most games I'm playing are actually fully on-chain, But now that you mention this(With SP and GU), I realize that might not be the case. I've seen games make descriptions of how in-game transactions are monitored and tracked on the blockchain (SO, it depends on the amount and levels of transactions that is being tracked, I'm guessing)

Games like Prospectors with high-level details def shouldn't be fully on-chain if Even Splinterlands is not

Hopefully this will change at some point but for now I think on-chain games have a performance liability
Yeah, let's look forward to that!