This and the sequel are both currently on sale on GOG as well.
https://www.gog.com/en/game/costume_quest https://www.gog.com/en/game/costume_quest_2
This and the sequel are both currently on sale on GOG as well.
https://www.gog.com/en/game/costume_quest https://www.gog.com/en/game/costume_quest_2