Costikyan's works include:
- The Creature That Ate Sheboygan
- Star Wars: The Roleplaying Game
- Pax Britannica
- Toon: The Cartoon Role-Playing Game
- Violence: The Roleplaying Game of Egregious and Repulsive Bloodshed
- Web And Starship
- Mad Maze
- Vector 3
- Another Day, Another Dungeon
- By The Sword
- First Contract
- One Quest, Hold the Dragons
Works by Greg Costikyan with their own pages:
Other works by Greg Costikyan contain examples of:
- Cluster F-Bomb: In Violence, one of the ways to earn extra character points is to agree to make one out of every four words out of your character's mouth be an obscenity.
- Crazy-Prepared: Spoofed in Another Day, Another Dungeon. In the Dungeons and Dragons rule book, the list of standard equipment items included a ten-foot pole, which generated much player lore about the uses for this item and about GMs responding by putting useful items eleven feet away to keep them out of reach. For this reason, one of the main characters in Another Day, Another Dungeon carries a collapsible eleven-foot pole.
- Cup Holders: In First Contract, aliens come to Earth peacefully, but are so scientifically advanced, Earth can't keep up with inter-galactic trade. So what can Earth manufacture? Cheap little doohickeys (which, due to disparities in interstellar exchange rates, the companies involved are able to charge thousands of dollars for). The one that's made in the story is a cup holder that works in zero gravity. It becomes ridiculously popular.
- Genre Deconstruction: Violence™: The Roleplaying Game of Egregrious and Repulsive Bloodshed is a vicious satire of the way nearly anything done in the average roleplaying game would be violent sociopathy in real life.
- King Incognito: In Another Day, Another Dungeon, Vic, the senile old man who tells long, pointless stories and begs for spare change, turns out to be the last polymage, a type of sorcerer thought to have died out more than ten thousand years ago.
- Let X Be the Unknown: Violence was credited to the pseudonym "Designer X".
- Our Liches Are Different: In Another Day, Another Dungeon, a lich functions as the main Big Bad's dragon. He's an undead sorcerer, but he's pretty much the Only Sane Man for Team Evil. He once spent a century as a disembodied skull being used as a birdfeeder, and it's left him with an almost uncontrollable urge to kill all songbirds.
- Prince Charmless: In By the Sword, the princess has great misgivings about her Arranged Marriage to one of these princes. The prince is fat, smelly, and has bad table manners. The princess eventually talks to a member of the prince's court, who explains that the prince is actually a very gentle man, and he's also extremely gay, so the princess never has to worry about having to have sex with him. She is reassured by this, and decides that this marriage won't be so bad.
- Stray Shots Strike Nothing: Violence has its vicious way with this trope in the section of Combat marked "Innocent Bystanders", and points out the consequences of a gun battle (if it can really be called such) between a violent scumbag with an Uzi (your typical Violence player character) and a little old lady with a revolver in her apartment. The old lady got two shots off before getting cut down, and neither one of them hit Uzi guy, but they did go through the wall (made of cheap modern wallboard which can't stop bullets worth crap), and some poor immigrant in another apartment packed full of them is now without much of her lower arm. Meanwhile, Uzi guy got off twenty shots of which maybe three hit the old lady. The prewar brick wall behind her absorbed the impact of most of the bullets, but the rest went through a window, shattering it and resulting in casualty number two, a bike messenger who was riding below the window when it shattered and is now bleeding on the sidewalk and screaming bloody murder. Meanwhile, whatever bullets didn't go halfway through the bricks of a building across the street went through another window along the way, grazing the head of the kitty sleeping on the windowsill and possibly hitting the personal trainer who lives there, who is now prone on the floor and calling 911 on his cellphone. Needless to say, there's a reason that the law frowns upon firing weapons in city limits.
- Take That, Audience!: Violence™: The Roleplaying Game of Egregrious and Repulsive Bloodshed is a vicious satire of the way nearly anything done in the average roleplaying game would be violent sociopathy in real life. It opens with the words "Welcome to Violence, you degraded turd", and continues in the same vein.You puerile adolescent- and post-adolescent scum don't give a tinker's cuss. ...there's no point in trying to write a good set of rules because you idiots can't tell the difference between a good set and a bad set anyway.
- True Love's Kiss: Deconstructed in the short story "And Still She Sleeps". No one can wake up the maiden who's been asleep for centuries, because no one can truly love her when they can't get to know her. In the end, they put her in a museum until some future wizard can figure out how to wake her.
- You Bastard: Violence consists in its entirety of a long and detailed You Bastard aimed at hack-and-slash roleplayers.