The first two Digimon Story games are available in English on the Nintendo DS, but none of the newer games have been released in English, unfortunately. The upcoming Vita game, Digimon Story: Cybersleuth, looks pretty damn amazing and there's a campaign to get it released over here. Check out the trailer:



There is a fairly meh Korean F2P MMO called Digimon Masters, which is available in English and has a lot of Digimon, some of which can even be used as mounts. It's not brilliant, but you might enjoy it.