Quarth

Quarth
Arcade flyer
Developer(s)	Konami
Publisher(s)	Konami
Composer(s)	Norio Hanzawa
Platform(s)	Arcade, MSX2, NEC PC-9801, X68000, Famicom, Game Boy, Mobile phone
Release	Arcade JP: October 9, 1989[1] WW: Late 1989 MSX2 JP: March 9, 1990 Game Boy JP: March 16, 1990 NA: December 1990 Famicom JP: April 13, 1990 i-mode phones EU: 2005 i-Revo JP: June 19, 2006 Virtual Console Wii (MSX) JP: February 2, 2010 Nintendo 3DS (Game Boy) JP: February 22, 2012 NA: September 27, 2012 Wii U (MSX) JP: April 23, 2014 PS4 & Nintendo Switch (Arcade) WW: January 21, 2021
Genre(s)	Puzzle game, shoot 'em up

Quarth (クォース, Kwōsu), known as Block Hole outside Japan, is a hybrid puzzle/shoot 'em up game developed by Konami which was released in 1989 as an arcade game. Besides the arcade version, there were also ports of the game to the MSX2 (with a built-in SCC chip), Famicom, and Game Boy—home releases used the Quarth name worldwide (with the exception of the Game Boy Color release in Europe of Konami GB Collection Vol. 2, where the game was renamed to the generic title Block Game for unknown reasons).

Quarth was released on the Konami Net i-mode service as Block Quarth, with an updated Block Quarth DX in 2001. It was released without the "DX" suffix in 2005 and was made globally available through Konami Net licensing on many i-mode services offered by mobile operators. In Europe, for example, it was available from O2 UK, O2 Ireland, and Telefónica Spain.

In 2005, Konami also included the game in the Nintendo DS title Ganbare Goemon: Tōkaidōchū Ōedo Tengurikaeshi no Maki. An emulated version of the game was released in 2006 for PlayStation 2 in Japan as part of the Oretachi Geasen Zoku Sono series.