Sentinel (1984)(Abacus Programs)[16K] ROM for ZX Spectrum (TAP). Sentinel (1984)(Abacus Programs)[16K] game is available to play online and only onRoms Games. Sentinel (1984)(Abacus Programs)[16K] ROM for ZX Spectrum requires an emulator to play the game offline. This Game is English (USA) Version and is the highest quality available.