Multiple Game Modes

Hello, I have a question regarding game modes. I am currently making an mmorpg game and want to make it to where I can walk up to a player and dual them in a card game. Making an interface for it isnt a problem. Was looking into the CCG toolkit, yet when I messaged the dev, he wasn’t entirely sure how to achieve this (its a “create a project” which would require merging, which there is no tutorial on). It is multiplayer supported. So my question is, how would I go about doing this? I most certainly am not going to purchase the CCG toolkit if I cant achieve this. While on the other hand, creating a card game from scratch would take an immense amount of time. So far the only thing I have been able to think of is interface button - > load ccg level with the level set to ccg game mode. And that is a maybe. Yet, I can see this being a problem with multiplayer. Any help on the matter? Thanks.