How can you have a list of 80s cheesy sci-fi with no Troma? The Toxic Avenger, Class of Nuke Em High, Surf Nazis Must Die.
On top of being a list of big budget films these are supposed to be under appreciated? Ghostbusters had a sequel in the 80s, basically continuous TV presence for the past ~40 years, and unreasonably huge merchandiseing. It's one of the most successful franchises of all time.
Top Gun for the nes. I never actually finished the first mission. I could beat Mike Tyson but that aircraft carrier kicked my ass.