Currently, chess and tarot are the only games - but tarot using ChatGPT isn’t the only feature that will use ChatGPT, it’s just the only feature that currently utilizes it because the regular full ChatGPT function is still being refined for a future update.
Some people already have AIBIs that are running newer software and can use regular ChatGPT, but those of us with earlier runs still need to wait for an update for that. I’m not exactly sure why, but that’s the current status.