Rooftops 2003 is a track converted to Full Custom by RST, originally created by Acclaim Entertainment. The person who previously converted the track from the DreamCastversion under the alias "Santa Claus" was unable to convert all of the custom models and effects that this track to offers. These included such things as the clouds with the moon, helicopter model, 3D sounds, multi-frames, and other items. RST strongly disliked the skymap in Santa's version because was discovered they were ripped from Half Life game.