Nights

Night 1
Night 1 is the first playable night of Five Nights at Treasure Island. Compared to the later nights, this night is relatively easy and serves mainly as an introductory stage that accustoms the player to the game's mechanics, allowing the player (if new) to get used to how to survive, and to get use to the building's whereabouts. Photo-Negative Mickey is the only active character this night. MickMick, Oswald and The Face rarely can become active on this night.

Night 2
Night 2 is the second playable night of Five Nights at Treasure Island, as-well as the last playable night in the old demo. This night starts immediately increasing the difficulty, as Photo-Negative Mickey will start to get more active and Dark Oswald becomes a threat from this point onward. Disembodied and The Face are also active this night and one of them can also sometimes appear in the Office, effectively multiplying the number of potential threats to watch out for.

Night 3
Night 3 is the third night of Five Nights at Treasure Island. Unlike the previous two nights, this night is cut short to 3:AM, which the player will be sent to Pirate Caverns, which that is where the player will have to survive against The Face and Undying. Photo-Negative Mickey and Oswald are more aggressive than they were in the previous night. The Face and Disembodied also have a higher chance of entering the Office this night compare to the previous night. Acephalous and Suicide Mouse will be active on this night as well. On rare cases, Pluto may enter the Office. Henry will call you on this night.