The rare game "Christmas NiGHTS" was dispensed for free one year. It was a small game, with 1 pallette swapped level (the Garden, but winterey) & pallet swapped NiGHTS character (red & white holiday theme, with pompom jester accessories) However, you could unlock a mode where you could play as Sonic. (one of his VERY first 3D appearances) Sonic couldn't fly, but you could jump him enough to get to the boss. The usual boss of the area was "Puffy" the opera singing beachball-rabbit-woman combination. (its a dream) But when you use Sonic she is
pallet swapped into Eggman, who is wearing a Santaclaus like suit (but can still be thrown/hit through the walls to be eliminated) Discovered by Piplupfan77