Title	Label	Cover
Amstrad CPC
	The Sentinel · Cassette · 1987	Firebird
	The Sentinel · Floppy Disk 3' · 1987	Firebird
	The Sentinel · Cassette · 1987	Dro Soft
Commodore 64/128
	The Sentinel · Cassette · 1986	Firebird
	The Sentinel · Cassette · 1986	Firebird
Commodore Amiga
	The Sentinel · Floppy Disk 3,5' · 1984	Firebird
ZX Spectrum
	The Sentinel · Cassette · 1984	Dro Soft
	The Sentinel · Cassette · 1987	Firebird
	The Sentinel · Floppy Disk 5'25 · 1987	Firebird

Wikipedia

The Sentinel, released in the United States as The Sentry, is a puzzle video game created by Geoff Crammond, published by Firebird in 1986 for the BBC Micro and converted to the C64 (by Crammond himself), Amstrad CPC (with a cross-compiler written by Crammond), ZX Spectrum (by Mike Follin), Atari ST, Amiga (both by Steve Bak) and PC (by Mark Roll), J2ME (by Momor Prods). It was among the first games to feature solid-filled 3D computer graphics on home computers. While it ran acceptably fast on 16-bit computers, it was slow on 8-bit machines such as the C64, where the next view took up to three seconds to be precomputed. Despite this, the game retained a dedicated base of fans, some of whom were able to modify their computers to enjoy it better (for example, by using a CMD SuperCPU in a standard 1-MHz 6502 Commodore 64 to achieve CPU clock speeds of 20

Credits

CPCPOWER zxdb lemon64 atari legend BBC Micro Lemon Amiga Hall of light Wikipedia (EN) World of Spectrum