Siege (Postern/Wye Valley/Sinclair Programs/Andrew Burnham) Available for BBC Model B, Commodore Vic 20, Spectrum 16K, Spectrum 16K/48K/Plus/128K & Spectrum 48K
Siege (ANALOG Computing) Available for Atari 400/800/600XL/800XL/130XE
Siege (Melbourne House) Available for Commodore Vic 20