[Cosmic Tortoise]

I remember playing on this special round where the traitors were revealed for the first couple seconds and you had to memorize who it was to kill them, but in turn the traitors were harder to kill? because they would leach health, like a "vampire" mechanic or something. It was a pretty fun special round from what I recall.

Low gravity FFA with scouts is also fun
FFA Gun game is fun as well

I know of one similar that might still be in the que.  Normal amount of traitors, but they are all disguised/invisible ( radar doesn't reveal ).  They are listed on tab menu as who each traitor is.  Everyone is detective with 1 credit.