Right now, I’m fairly certain the only way to go about this is via v3 and v5 APIs. To do it via v5, you’d need to make calls to the following:
Get id of username:
https://api.twitch.tv/kraken/users?login=<channel Name>, documentation: https://dev.twitch.tv/docs/v5/reference/users/#get-users
Get game assigned to channel:
https://api.twitch.tv/kraken/channels/<channel ID>, documentation: https://dev.twitch.tv/docs/v5/reference/channels/#get-channel-by-id
The response in that final request will include the recently played game.