ChallengeIntro
UT :: Actor (UT) >> Info (UT) >> GameInfo (UT) >> TournamentGameInfo >> DeathMatchPlus >> ChallengeIntro (Package: Botpack)
ChallengeIntro is the gametype used for the CityIntro map (the intro that shows up when you start UT). From what it appears this just tweaks a few things such as making all players spectators (possibilities with subclassing but i wouldnt even bother with it)