The first console I got was Action Max.

The guy at the video store where I got it from insisted I get something better like the Sega Master system, but I thought playing games that were on VHS cassettes and shooting things onscreen would be way better.
Here's how you'd
calibrate the gun.
I got 4 games: .38 Ambush Alley,
Hydrosub: 2021,
The Rescue of Pops Ghostly, and Sonic Fury.
It pretty much became obsolete in my house when I got NES a few months later.
