Downloading old movies, gimme suggestions

War of the Worlds from 1953 (Ignore the pictures on IMDB, they are not even from that movie!). That movie had special effects that would have been considered good in the late 80's, and while even less faithful to the book than Spielbergs monstrosity, it's at least a very good movie.

Maybe Blade Runner.
A very good Sci-Fi classic.

Let me suggest for now Short Circuit and Short Circuit 2. They just somehow got in my head. :P

Yankee Zulu, Predator, Major Payne, Capricorn One

Good old stuff

A Clockwork Orange
Evil Dead, Evil Dead 2 and Army of Darkness (Evil Dead 3)
Braindead
Old western films like A Fistful of Dollars trilogy

Predator, Commando...instant classics.

Time Bandits.
Every movie by Mel Brooks
UHF
Bad Taste

I know its not for everyone, but maybe you will like it

Enemy Mine
The Dark Crystal
Freaked
Willow

Close Encounters of the Third Kind a real classic.

Escape from New York!

Independance Day!

Jurassic Park!

Wake In Fright

Heat.

It's an all star cast movie staring DeNiro, Pacino, Kilmer and more.

Remember that opening scene in The Dark Knight? Or the Payday games? They drew inspiration from the movie Heat.

Some movies I remember enjoying...

Forbidden World
Joysticks
Miami Connection
Night of the Comet
Punk Vacation
They Live

Boogie nights, Platoon, Pulp Fiction, Goodfellas, Mars attacks, A night at the Roxbury

Not sure if already mentioned, but RoboCop!

Also Judge Dredd ;-)

Why has nobody mentioned weekend at Bernie's and Ferris Bueller's day off yet? They are 80s comedies, full of cheese and as an adult I want to punch Ferris in the face...But they are classic 80s cheese. :p

Timebandits

Goodfellas, Pulp Fiction, New Jack City, The Boondock Saints (newer than you asked for but I love gangster movies), Boyz N The Hood, The Shawshank Redemption, Real Genius, and I'm sure there's quite a few more I could think of but these should be enough. They're mostly from the 1990's but I can't help it.

EDIT: Apparently nobody suggest The Shining yet, which I find kind of strange.

Lo scopone scientifico, a really good italian movie.

Singin' in the Rain

Not exactly 80s or 90s, but here is my retro list - https://rateyourmusic.com/list/Frippotronic/i_feel_retro/

Not much of an oldie but i'm watching the whole Matrix right now so I thought i'd drop it here.

EDIT: Also, heard that Pulp Fiction is an amazing film.