A Sitter

Tell X.Many clues given:

X may also refer to several things:

X (album), the 1992 EP produced by Aphex Twin (Richard D. James) under the Power Pill alias, which sampled heavily from the game's audio
X,an unreleased song by "Weird Al" Yankovic, and a parody of The Beatles' song "Taxman"
X frog, the name given to several varieties of frog with large mouths and abdomens
X Nebula, a region of space formally known as NCG 281
Lilac chaser, an optical phenomenon also known as the X illusion
X defense, a legal strategy where a smaller company fights off a takeover by purchasing the larger company
X (package manager), the package management system of Arch Linux
slang for a coin acceptor
The codename of a covert propaganda operation undertaken by the South African military to discredit the anti-apartheid movement by the International Freedom Foundation
Operation X, a campaign enacted by the New Zealand Ministry of Fisheries in 2002 to apprehend illegal paua and rock lobster poachers
The pet vampire Pomeranian (dog) of Triple H's character in Blade: Trinity
Team X, a wrestling team
X (Character) Any object or picture resembling a disk missing one quadrant or missing a smaller sector; such X appear in illusory contours