Since I'm bored right now, I thought I might as well post this for people who might be looking for games for one of the 8-bit era (NES, SMS, 7800) systems. Here are some of my recommended games for each system.

NES

Super Mario Bros. series

Metroid

The Legend Of Zelda

Mega Man series

Castlevania series

Gradius

GI Joe

Ninja Gaiden series

Bionic Commando

Contra

Blaster Master

Strider

Air Fortress

Double Dragon series

Duck Tales

Panic Restaurant

Life Force

River City Ransom

Journey To Silius

1943

Metal Storm

Super C

Mike Tyson's Punch-Out

Kirby's Adventure

Shatterhand

Mighty Final Fight

SMS

Sonic series

Alex Kidd In Miracle World

Phantasy Star

Golden Axe Warrior

Wonder Boy series

R-Type

Zillion series

Outrun

Rastan

Power Strike series

After Burner

Shinobi

Alien Syndrome

Space Harrier

Ninja Gaiden

Outrun Europa

Psycho Fox

Cyborg Hunter

Aerial Assault

Golvellius

Kenseiden

Robocop vs. The Terminator

7800

Ballblazer

Commando

Ninja Golf

Scrapyard Dog

Alien Brigade

Food Fight

Joust

Fatal Run

Midnight Mutants

Asteroids

Desert Falcon

Centipede

Robotron 2084

Xenophobe

Planet Smashers

Dark Chambers

Basketbrawl

Mario Bros.

Donkey Kong (just remember to turn the sound down, of course)

Galaga

Ms. Pac-Man

Rampage

Xevious

Ikari Warriors

Dig Dug