Thanks for the tips,I will ask them both. Indeed, I already had this problem with a German publisher - they would publish a gamebook,but not cards. Concerning using the mechanics, I planned on releasing a "built on the Doom Pilgrim engine" stamp for those who would want to use it, so if you want just hit me up and I will send you this logo. A few games already "borrowed" these mechanics without mentioning DP, btw.