There are free mods available on websites dedicated to Cave Story modding. These mods can range from simple aesthetic changes like new character skins to more complex overhauls of the entire game. Some modders release their work for free as a way to contribute to the community and show off their creativity. You can often find them by searching for 'Cave Story mods' on search engines.
There are certain indie game communities where developers or fans might share free versions of Cave Story. However, make sure to check the legality of these sources. One such place could be itch.io. It has a large collection of indie games, and some of them are free. It's possible that you could find a version of Cave Story there.
One game similar to Cave Story is Kero Blaster. It has a similar pixel - art style and engaging gameplay. You play as a frog - like character, shooting your way through levels filled with various enemies.
Another game is VVVVVV. It has a simple yet captivating art style. The core gameplay of VVVVVV, which involves flipping gravity to navigate through levels, is unique but still shares the sense of exploration and platforming challenges that are characteristic of Cave Story.
One of the things that makes 'Cave Story' great is its story. It's deep and interesting. You play as a character who wakes up in a cave and has to figure out what's going on. There are mysteries to solve, and the characters you meet along the way are unique. The pixel art graphics also add to its charm. It gives it a nostalgic feel that many gamers love. Plus, the music is really catchy and sets the mood perfectly for the different parts of the game.
You can often find 'Cave Story' on platforms like Steam. Sometimes it's offered for free during special promotions. Also, check out some indie game websites as they might have it available for free download.
The game 'Metanet Hunter' is similar. It has a simple yet addictive gameplay where you control a character and navigate through levels, much like in Cave Story. It also has some platforming elements.
One similar game is 'La-Mulana'. It has a lot of exploration elements just like Cave Story. You need to traverse through ancient ruins, solve puzzles, and fight against various enemies. The graphics have a retro feel to them which is also a characteristic shared with Cave Story.