Verifica ca ai wine mai mare de 6.11:
pamac list -i | grep wine
Wine-Version

Instaleaza grapejuice (sub Lutris inca nu merge):
pamac install grapejuice-git Wine-GrapeJuice

Lanseaza orice blox de pe site-ul Roblox direct.

Have fun, kid.

Links:
grapejuice
lutris
roblox