The 21st of September? What's special about that day in particular?
PS4 and PC for Monster Hunter: World, and 3DS and Nintendo Switch for Monster Hunter Generations. There's also Monster Hunter Stories for 3DS - that has a free demo I believe, and I'd recommend you give it a look-in if you're interested. It's a little more...light-hearted, shall we say? The combat is vaguely similar to Pokemon as well. I'm not sure you'd like the franchise outside of that, as they're quite violent games...the basic idea is to hunt monsters, after all. In Stories you ride them and it's more plot driven~