42		Grandmaster Chess (DOS, 1992)
42		Chess! (DOS, 1992)
41		Psion Chess (DOS, 1985)
41		Fritz 6 (Windows, 2000)
40		Chess (DOS, 1981)
40		Simply Chess (Windows, 2015)
40		Bluebush Chess (DOS, 1983)
40		Chess 2: The Sequel (Windows, 2014)
40		Mychess (DOS, 1984)
40		Chess System Tal (DOS, 1997)
40		Virtual Chess (DOS, 1995)
40		Fritz & Kishon: Schachspielen mit dem Meister der Satire (Windows, 2007)
40		Sargon III (DOS, 1984)
40		HIARCS 8 (Windows, 2006)
40		Chess System Tal II (Windows, 1999)
40		Mephisto Genius 99 (Windows, 1999)
40		Power Chess 2.0 (Windows, 1999)
40		Power Chess 98 (Windows, 1997)
40		Chess.net for Windows (Windows, 1999)
40		Chess.net Gold (Windows, 1999)
40		Chess Champ (Windows, 2003)
40		Classic Games: Chess (Windows, 2002)
40		Fritz 7 (Windows, 2001)
40		Microsoft Bicycle Series (Windows, 2001)
40		Virtual Chess (Windows, 1995)

Notes: Games similar to PowerChess, Games like PowerChess, DOS, Strategy, Tactics, Chess, Top-down, PC, Game Similarities.