Yes yes, Red's on the wiki, but is he in the game?
This is a slightly confusing question. In what game? The game was never finished.
To give a more clear answer, I need to explain the process that was in place.
1 - A bunch of people earned the right to have collaborations with myself and Matt. Early people paid for this, and later people won it through community votes. All of those collaborations are "official CKC characters." They are part of the world, lore, etc.
2 - Early on, we voted on the roster for Fall of Nemesis - the CKC video game. This was long before Red even became an official CKC character. So he wasn't part of that vote.
3 - The long-term plan was to develop additional games, and thus (eventually) hold more votes for who would be on the roster. But since we never finished Fall of Nemesis - we never got to a point where it made sense to seriously discuss rosters for later games.
I'll also point out that all of this - game roster votes, collaborations, etc - happened well after all of the fundraising was completed.