(Note:  I'm only listing games that I have Codes/Hints/etc.. for.  There are MANY more games for the Master System)

A

Action Fighter
Afterburner
Alex Kidd in High-Tech World
Alex Kidd - The Lost Stars
Alex Kidd in Miracle World
Alf
Alien 3
Alien Storm
Alien Syndrome
Altered Beast
American Pro Football
Assault City
Asterix
Astro Warrior
Aztec Adventure

B

Back to the Future Part 2
Bank Panic
Bart vs. the Space Mutants
Batman Returns
Black Belt
Blade Eagle 3D
Bomber Raid
Bonanza Bros.
Bubble Bobble

C

California Games
Captain Silver
Casino Games
Champions of Europe
Chase HQ
Choplifter
Cloud Master
Cool Spot
Cyber Shinobi
Cyborg Hunter

D

Dick Tracy
Donald Duck: The Lucky Dime Caper
Double Dragon
Dragon Crystal
Dynamite Duke

E

Enduro Racer

F

F-16 Fighting Falcon
Fantasy Zone
Fantasy Zone 2
Flintstones
Forgotten Worlds

G

Gain Ground
Galaxy Force
Gangster Town
Gauntlet
Ghostbusters
Ghost House
Ghouls 'N Ghosts
Global Defense
Global Gladiators
G-Loc
Golden Axe
Golden Axe Warrior
Golvellius: Valley of Doom

I

Impossible Mission
Indiana Jones & The Last Crusade

J

James Bond - The Duel

K

Kenseiden
King's Quest
Krusty's Fun House
Kung Fu Kid

L

Lemmings
Light Force
Lord of the Sword

M

Marble Madness
Marksman Shooting, Trap Shooting & Safari Hunt
Master of Darkness
Maze Hunter 3D
Michael Jackson's Moonwalker
Mick & Mack
Mickey Mouse - Castle of Illusion
Mickey Mouse - Land of Illusion
Miracle Warriors
Montezuma's Revenge
Moral Kombat 2
My Hero

N

New Zealand Story
Ninja

O

Operation Wolf
Out Run

P

Pacmania
Paperboy
Penguin Land
Phantasy Star
Populous
Posiedon Wars 3D
Power Strike
Predator 2
Prince of Persia
Pro Wrestling
Psycho Fox

Q

Quartet

R

Rambo: First Blood Part 2
Rambo 3
Rampage
Rastan
RC Grand Prix
Rescue Mission
Robocop vs. Terminator
Rocky
R-Type

S

Sagaia
Secret Commando
Sega Arcade Smash Hits
Shadow Dancer
Shanghai
Shinobi
Slap Shot
Snail Maze
Sonic Chaos
Sonic the Hedgehog
Sonic the Hedgehog 2
Space Harrier
Space Harrier 3D
Speedball 2
Spellcaster
Spider-Man Vs. The Kingpin
Star Wars
Streets of Rage
Strider
Super Kick-Off
Super Monaco Grand Prix
Super Monaco Grand Prix 2
Super Smash TV
Super Space Invaders

T

Taz-Mania
Teddy Boy
Terminator
Thunderblade
Thunderblade 2
Time Soldiers
Tom & Jerry
Transbot

V

Vigilante

W

Wanted
Wimbledon Tennis
Wolfchild
Wonder Boy
Wonder Boy in Monster Land
Wonder Boy 3: The Dragon's Trap
World Class Leaderboard

X

Xenon 2

Y

Ys: The Vanished Omens

Z

Zaxxon 3D
Zillion
Zillion 2 - The Tri Formation
Zool