Welcome to #FreeGameFriday, where we suggest a new game for you to play every Friday. And it won’t cost you a dime.
I cannot offer enough praise for this indie classic. Cave Story is a metroidvania-type game that’s very well-built, it’s got a great story, and the soundtrack is amazing. There are many hours of gameplay to be found inside, along with vast secrets and three different endings.
Best of all, the original version is free (there is a remaster on Steam, but that costs $15).
You can get it here for Windows, macOS, Linux… and a whole bunch of other platforms.