Castles II: Siege and Conquest is a 1992 real-time strategy game for the MS-DOS, developed by Quicksilver Software and published by Interplay Productions. Castles II is the sequel to the 1991 game Castles. Ports for the Amiga CD32, FM Towns, NEC PC-9801 were released in 1993. DOS CD-ROM version and Macintosh port were released in 1994. The Macintosh version of the game was published by Interplay's MacPlay brand name. GOG.com released an emulated version for Microsoft Windows in 2008.