Mystery Of The Indus Valleys (1988)(Alternative Software)[a2] ROM Download for ZX Spectrum (TAP). Mystery Of The Indus Valleys (1988)(Alternative Software)[a2] game is available to play online and download only on Roms Games. Mystery Of The Indus Valleys (1988)(Alternative Software)[a2] ROM for ZX Spectrum download requires an emulator to play the game offline. This Game is English (USA) Version and is the highest quality available.