* _Hackmaster_ , a fantasy role-playing game like _ Dungeons & Dragons  _ , but even more baroquely complex. _Hackmaster_ games are typically set in _Garweeze Wurld_ , a reference to  Gary Gygax  's _World of Greyhawk_ campaign setting. It is the game most often shown being played. Kenzer and Company has published multiple  real-world versions of the game  , including supplements with names taken from the comic (e.g. the _Hacklopedia of Beasts_ guides to the monsters of Garweeze Wurld). In the very early _Shadis_ scripts, the game the group plays is apparently called _Dung & Dragons _ (although this is only seen on the back of B.A.'s GM screen). _HackMaster_ is initially described as a home-brewed rule set by B.A., but was later declared to be a published product.
* _Spacehack_ , a science-fiction role-playing game like  _Traveller_  "Traveller \(role-playing game\)") . Early strips implied this to be exactly the same game as _HackMaster_ with different names, but it diverged later. One early storyline features the Knights' _Spacehack_ characters traveling through a rift in space to Garweeze Wurld, where they encountered their _Hackmaster_ characters. Several single-frame strips referring to _SpaceHack_ were originally advertisement strips for the sci-fi RPG _Fading Suns_ (which otherwise has no relationship to Hackmaster)
* _Scream of Kachooloo_ , a horror role-playing game closely modeled on  _Call of Cthulhu_  "Call of Cthulhu \(role-playing game\)") .
* _HackNoia_ , a modern-day espionage role-playing game like TSR's  _Top Secret_  "Top Secret \(role-playing game\)") .
* _Heroes and Zeroes_ , a superhero role-playing game like  _Champions_  "Champions \(role-playing game\)") .
* _Cattlepunk_ , a Western role-playing game like TSR's  _Boot Hill_  "Boot Hill \(role-playing game\)") . The earliest strips call it _Hackmaster: Cattlepunk_ , implying it may be a supplement or variation on that game. Kenzer and Company has published its own Western-themed game named _ Aces & Eights: Shattered Frontier  _ .
* _Crime Nation_ , a role-playing game where the characters are gang members in a crime-ridden city.
* _Dawg: The RPG_ , a role-playing game, designed by B.A. Felton, where the characters are dogs of various breeds, similar to _ Bunnies & Burrows  _ , which featured rabbit characters. Was self-published by B.A. and was a disastrous failure; the one time the group played it, the session consisted almost entirely of making "saving throws versus Canine Compulsion" to avoid their character acting like an actual dog. Was later picked up by Hard Eight after an intellectual property dispute with Heidi and "tidied up" by Jo Jo Zeke.
* _Vampyres: Lords of Darkness_ , a live-action role-playing game like White Wolf's _ Vampire: The Masquerade  _ .
* _World of Hackcraft_ , a massively multiplayer on-line role-playing game set in Garweeze Wurld, modeled on _ World of Warcraft  _ .
* _Spelljacked_ , a fantasy-themed collectible card game like _ Magic: The Gathering  _ and _ Spellfire  _ . _Spelljacked_ is depicted as Hard Eight's failed attempt to cash in on the CCG craze; they were later forced to practically give away their remaining stocks of cards.
* _ Fairy Meat  _ , a miniatures game designed by Pete Ashton about cannibalistic fairies. Later published as a real-world game.
* _Risque_ , a board game of world conquest modeled on  _Risk_  "Risk \(game\)") .
* _Island of Kataan_ , a board game of building and trading modeled on _ The Settlers of Catan  _ . When the Knights play it, most of them are baffled by its complete lack of rules for combat.
* "TreasonHackers", a RPG that mimics "  Paranoia  "Paranoia \(role-playing game\)") ". It only shows up in the animated YouTube videos, and Brain thinks it's a joke due to the high lethality rate.
* _RoadHack_ , a post-apocalypse highway game of car-to-car combat _a la_ _ The Road Warrior  , _ clearly based on _ Car Wars  _ .
* _The Great War_ , an extremely detailed simulation of the First World War, costing several hundred dollars. A number of Muncie gamers formed the "Guns of August Society" to purchase and play it; over the years, all except Weird Pete and Brian have dropped out, and those two have been playing the game, at the rate of one turn per month, for fifteen years. When Johnny Kizinski briefly returned to the Society, he found that Pete and Brian had stopped attacking each other and were continuing to play the game peacefully simply to keep it running: Johnny attacked, upsetting the balance. A reference to the "monster games" of wargaming's past, such as  SPI  's _ War in Europe  "War in Europe \(game\)") _ or  GDW  's  Europa Series  "Europa \(wargame\)") .
* _Virulence: The Game of Biological Warfare_ , a boardgame with both cooperative and competitive elements, centered around keeping a patient alive as it is attacked by various diseases while engineering diseases to attack other teams' patients. Similarly themed to the cooperative board game _ Pandemic  "Pandemic \(board game\)") _ .