Is Shin Megami Tensei III Nocturne HD remaster on gamebillet region locked?

Just as the title says, I want to know if anyone here bought the key from them and could confirm if their key is WW/RoW or region-locked. I'm trying to access the game page (https://www.gamebillet.com/shin-megami-tensei-iii-nocture-hd-remaster) to check if it activates in Brazil, but it seems like the page is unavailable in my country, even though every other page I entered on their website worked flawlessly... Sorry if this is a really dumb question or if this type of discussion is not allowed by the guidelines, just wanna make sure I'm buying something I can activate, ya know? Thanks in advance.