Ok, this is a pretty insane request I know but I have seen it done, just the guy on stream was unwilling to say how or where he got the game from. So basically he had on screen an enemy with 8 bit style dudes attacking the enemy. Those 8 bit style dudes being members of active chat. Basically, the more people talked in chat, the more damage it did to the enemy. Once defeated the enemy would respawn in, but with more HP and would thus require more people chatting to kill the said enemy. All this was represented on screen in 8 bit style. I think this would be amazing to have on a stream and would encourage more people to chat within the chat room. How he did it, I have no idea and I would assume it would require many lines of code, but thought I would throw this out there.
Hopefully something like this can be done, I for one would think it would be amazing!