If you're building a web3 game, and you don't offer a tool to export your in-game transactions to an easily importable turbotax format. US players can't play it.
But the problem is more complicated, everything in crypto is composable. So I could build a business off in-game assets, and the tool creator might have no clue that exists. So for example, in my space game example.... I might be able to use my minerals as collateral for a loan to buy another space ship. That loan might exist on a platform not developed by the game developers, and if it was the game devs that built the tax tool you're using... it might not properly capture that event. Maybe another platform offers insurance on that ship, and I need to pay a premium. The tool might not caputre THAT. The posssibilities for building a really cool space game are infinite, but these in-game events have real-world tax implications.