The DC Heroes 2nd Edition Role Playing Game by Mayfair Games is a full set with many components. This post, however will focus on the deck of character cards.
I’ve seen dozens of these sets over the years, and the cards are often the problem in a used set. Sometimes the cards are incomplete, and this reference is here to help me as much as you.

DC Heroes Role-Playing Game, 2nd Edition [BOX SET]
1989 … Mayfair Games (MGI) 245 … ISBN 0923763023
DC Heroes RPG page at the WB Old School Game Reference Site – Box sets and all the DCH adventure modules detailed.
The Cards
The Character Cards number 75 (plus 3 blanks). They are “playing card” size and format. Superhero personality art, with stats on the back. Nobody is specifically credited with the card art on the credits page in the book.


Animal-Man
Aquaman
The Atom


Batman
Big Barda
Black Adam


Black Canary
Black Orchid
Blackhawk


Blue Beetle
Booster Gold
Bronze Tiger


Captain Atom
Captain Boomerang
Captain Marvel


Catwoman
Changeling
The Cheetah


The Comedian
Count Vertigo
The Creeper


Cyborg
Danny Chase
Darkseid the Destroyer


Deadshot
Doctor Fate
Doctor Light


Dr. Manhattan
Duchess
Elongated Man


Fire
Firestorm
The Flash


Gnort
Green Arrow
Green Lantern (Hal Jordan)


Green Lantern (John Stewart)
Guy Gardner
Hawkman


Hawkwoman
The Huntress
Ice


Jericho
John Constantine
The Joker


Jonah Hex
Lex Luthor
Manhunter


Martian Manhunter
Metamorpho
Mister Miracle


Mr. Mxyzptlk
Nightwing
Nite Owl


Ozymandias
The Penguin
Plastic Man


Power Girl
The Question
Raven


Robin deceased
Rocket Red
Rorschach


The Sandman
Sergeant Rock
Shade the Changing Man


Silk Spectre
The Spectre
Starfire


Starman
Superman
Swamp Thing


Troia
Vixen
Wonder Woman

Blank Cards (3)
See Also:
WEBS: The Spider-Man Dossier (Marvel Super Heroes Box Set)
LANDS OF DR. DOOM: Marvel Super Heroes RPG Campaign Set (1992)