In november of 1987 Crash magazine published a special feature on 3D effects in ZX Spectrum games. The wrote about The Sentinel, 3D Ant Attack and other games, and a couple of pages were completely “3D”, which at the time meant blurry with red and green ink.
To view those 3D pages, a pair of 3D glasses were included with the magazine. I could not find many pictures, stories or mentions of the Crash 3D glasses on the internet, so I’m posting mine here.