[badpun]

For games, part of that mere „output” is 3d graphics, so replicating the internals of Direct 3D exactly right and getting the Linux GPU drivers to cooperate. That’s a hardcore task.

[coldpie]

Fun fact: MS Office also uses Direct3D :) See "Graphics" requirement here: https://support.microsoft.com/en-us/office/system-requiremen... We put a ton of effort into D3D11 specifically to get MS Office running.