In a twist that almost seems scripted, the last Atari 2600 game was produced by long-departed-Atari-founder Nolan Bushnell. Secret Quest was a decent send-off for the venerable console, one of the better games created for it.
It looks and plays like the offspring of Adventure and Berzerk. Maybe Escape from Castle Wolfenstein is a better comparison, you have to find keys and keep your ammo & life meters stocked with power-up items. It was a great game by Atari 2600 standards but couldn't touch the NES games released in 1988 like Metal Gear and Zelda II: The Adventure of Link.
1988 also marks the year that Atari unsuccessfully sued Nintendo for engaging in monopolistic practices. This was one of many bad decisions by Atari, a couple others will pop-up later I believe..