About Game



The Colossal Cave 3D

Target platform(s):

Windows / Mac / Quest 2

Anticipated Release Date:

The game is targeted for Fall 2022.


The Colossal Cave is a reimagining of a game, that was originally introduced in 1975 by Will Crowther and Don woods, as a 3d fully immersive VR experience.

The Colossal Cave is already well known to tens of millions of gamers worldwide. Several elements of the game such as the codewords “Xyzzy” and “Plugh” are recognized instantly by most gamers.

Roberta Williams, who has received widespread industry recognition including several “Hall of Fame” awards, and who is the designer of several industry leading hit games, including King’s Quest, Phantasmagoria, Black Cauldron and many more, is adapting the game for the VR world and bringing to life its many characters.

In the game, players explore a cave seeking treasure. Along the way they will encounter a variety of characters some of whom will attack and some of whom will entertain. For instance, there is a Troll (at the troll bridge), a bear, a snake, dwarves (seven of course), and a pirate. The player’s quest is to find all the treasure. The challenge is not easy and there will be a wide variety of puzzles to overcome.

Audience: Intended player segments/demographics

The Colossal Cave is a family-oriented game. The designer is known for the King’s Quest series of games and wants the same full-family demographic for this game.

Many parents have fond memories of the game and will look forward to introducing it to a new generation.


The Colossal Cave is being implemented as fully immersive 3d virtual reality exploration of underground caves. There are over 143 locations. The game is first person and makes excellent use of VR to provide a realistic cave exploration experience.

The game that inspired an industry

Reborn for a new generation, for virtual reality and for computers.

Roberta and Ken Williams who founded and ran Sierra On-Line for nearly 20 years have come back from a long retirement to pay homage to the game that that started it all: The Colossal Cave. Developed using Unity, over a two year period, Colossal Cave 3D is a first person, single player, 3D adventure that will delight the millions of Sierra and Colossal Cave fans worldwide. According to Ken Williams, “While locked down by the Pandemic I wrote a book about the old Sierra days. It’s success surprised me and brought back many memories of our days making games. This led me to investigating how modern games are made and I just started coding using the Unity game engine for fun. I was looking for something interesting to code when Roberta suggested Colossal Cave. Roberta started to work adapting it to 3D, and I assembled a team. As we dug deeper and deeper into the game we discovered layers of complexity that explain why the game became such an industry phenomena. It has action elements, humor, a scoring system, adventure elements, interesting characters, a huge world to explore and more. This is truly a game that will delight a new generation, and 100% different than anything I’ve seen in the market today.”

Key Features:

  • Completely immersive 3d world to explore
  • First person, 3d Adventure
  • Adapted by Roberta Williams, bestselling author of King’s Quest, Phantasmagoria and more
  • Ken and Roberta Williams, and Colossal Cave, are each known to millions of fans around the world
  • Quest 2 VR version, Windows and Mac

Product Specifications:

  • Publisher : Cygnus Entertainment
  • Developer : Cygnus Entertainment
  • Rating : E for Everyone (ESRB), 3+ (PEGI)
  • Category : 3D Adventure
  • Language : English


  • PC and Mac – Download, and available as boxed version (USB), summer 2022
  • Quest 2 – Download from Quest 2 store

Websites & Trailers:

  • colossalcave3d.com (Coming soon!)
  • Gameplay Footage (Coming soon!)
  • Screenshots (Coming soon!)
  • Trailer (Coming soon!)

Sierra On-Line was founded in 1979 by Ken and Roberta Williams. Ken Williams was Chief Executive Officer from 1979 through the sale of the company in 1996. At the time of the sale (for $1 Billion) Sierra had approximately one thousand employees and was publicly traded on Nasdaq. Sierra’s history has bee chronicled in many books and websites, including a bestselling book by Ken Williams, Not All Fairy Tales Have Happy Endings.

Many Sierra products topped bestseller charts. A sampling of Sierra’s products:

Kings Quest
Space Quest
and many more …

Wizard and the Princess 1980
Mission Asteroid 1980
Mystery House 1980
Crossfire 1981
Jawbreaker 1981
Laff Pack 1981
Lunar Leeper 1981
Softporn Adventure 1981
Threshold 1981
Ulysses and the Golden Fleece 1981
Cannonball Blitz 1982
Cranston Manor 1982
The Dark Crystal 1982
Dragon’s Keep 1982
Frogger 1982
Time Zone 1982
Ultima II: The Revenge of the Enchantress 1982
Apple Cider Spider 1983
B.C.’s Quest for Tires 1983
Bop-A-Bet 1983
Mine Shaft 1983
Mr. Cool 1983
Oil’s Well 1983
Sammy Lightfoot 1983
Troll’s Tale 1983
Ultima: Escape from Mt. Drash 1983
B.C. II: Grog’s Revenge 1984
Donald Duck’s Playground 1984
Gelfling Adventure 1984
King’s Quest: Quest for the Crown 1984
Learning with FuzzyWOMP 1984
Mickey’s Space Adventure 1984
Sierra Championship Boxing 1984
Winnie the Pooh in the Hundred Acre Wood 1984
Learning With the Leeper 1984
Wizard of ID’s WizType 1984
King’s Quest II: Romancing the Throne 1985
The Black Cauldron 1986
King’s Quest III: To Heir Is Human 1986
Space Quest: The Sarien Encounter 1986
3-D Helicopter Simulator 1987
Leisure Suit Larry in the Land of the Lounge Lizards 1987
Police Quest: In Pursuit of the Death Angel 1987
Mixed-Up Mother Goose 1987
Space Quest II: Vohaul’s Revenge 1987
Thexder 1987
Gold Rush! 1988
King’s Quest IV: The Perils of Rosella 1988
Leisure Suit Larry Goes Looking for Love (in Several Wrong Places) 1988
Manhunter: New York 1988
Police Quest II: The Vengeance 1988
Silpheed 1988
Codename: ICEMAN 1989
The Colonel’s Bequest 1989
Hero’s Quest: So You Want to Be a Hero 1989
Hoyle’s Official Book of Games: Volume 1 1989
Leisure Suit Larry 3: Passionate Patti in Pursuit of the Pulsating Pectorals 1989
Manhunter 2: San Francisco 1989
Space Quest III: The Pirates of Pestulon 1989
Conquests of Camelot: The Search for the Grail 1990
Fire Hawk: Thexder The Second Contact 1990
Hoyle’s Official Book of Games: Volume 2 1990
King’s Quest: Quest for the Crown (SCI remake) 1990
King’s Quest V: Absence Makes the Heart Go Yonder! 1990
Oil’s Well (remake) 1990
Quest for Glory II: Trial by Fire 1990
Red Baron 1990
Rise of the Dragon 1990
Sorcerian 1990
Zeliard 1990
The Adventures of Willy Beamish 1991
Castle of Dr. Brain 1991
Conquests of the Longbow: The Legend of Robin Hood 1991
EcoQuest: The Search for Cetus 1991
Gobliiins 1991
Heart of China 1991
Hoyle’s Official Book of Games: Volume 3 1991
Jones in the Fast Lane 1991
Leisure Suit Larry in the Land of the Lounge Lizards (SCI remake) 1991
Leisure Suit Larry 5: Passionate Patti Does a Little Undercover Work 1991
Mixed-Up Fairy Tales 1991
Nova 9: Return of Gir Draxon 1991
Police Quest III: The Kindred 1991
Mixed-Up Mother Goose (SCI remake) 1991
Space Quest: The Sarien Encounter (SCI remake) 1991
Space Quest IV: Roger Wilco and the Time Rippers 1991
Stellar 7 (remake of 1982 non-Sierra version) 1991
Aces of the Pacific 1992
Air Bucks 1992
Caesar 1992
The Dagger of Amon Ra 1992
The Even More Incredible Machine 1992
Front Page Sports Football 1992
Gobliins 2: The Prince Buffoon 1992
The Incredible Machine 1992
The Island of Dr. Brain 1992
King’s Quest VI: Heir Today, Gone Tomorrow 1992
Mega Math 1992
Police Quest I: In Pursuit of the Death Angel (SCI Remake) 1992
Quarky & Quaysoo’s Turbo Science 1992
Quest for Glory: So You Want to Be a Hero (SCI Remake) 1992
Quest for Glory III: Wages of War 1992
Red Baron: Mission Builder 1992
Shadow of Yserbius 1992
Take a Break! Crosswords 1992
WWII: 1946 1992
Crazy Nick’s Picks – King Graham’s Board Game Challenge 1993
Aces Over Europe 1993
Raymond E. Feist’s Betrayal at Krondor 1993
Police Quest IV: Open Season 1993
Detroit 1993
EcoQuest 2: Lost Secret of the Rainforest 1993
Fates of Twinion 1993
Freddy Pharkas: Frontier Pharmacist 1993
Gabriel Knight: Sins of the Fathers 1993
Goblins Quest 3 1993
Inca 1993
Inca II: Nations of Immortality 1993
Leisure Suit Larry 6: Shape Up or Slip Out! 1993
Lost in Time 1993
Pepper’s Adventures in Time 1993
The Prophecy 1993
Quest for Glory IV: Shadows of Darkness 1993
Sid & Al’s Incredible Toons 1993
Slater & Charlie Go Camping 1993
Space Quest V: Roger Wilco in the Next Mutation 1993
Take a Break! Pinball 1993
Yobi’s Basic Spelling Tricks 1993
Aces of the Deep 1994
Alien Legacy 1994
Battle Bugs 1994
The Bizarre Adventures of Woodruff and the Schnibble 1994
Front Page Sports: Baseball ’94 1994
The Incredible Machine 2 1994
The Incredible Toon Machine 1994
Lode Runner: The Legend Returns 1994
Lords of the Realm 1994
Metaltech: Earthsiege 1994
NASCAR Racing 1994
Outpost 1994
King’s Quest VII: The Princeless Bride 1994
3-D Ultra Pinball 1995
Aces of the Deep Expansion Disk 1995
Conqueror A.D. 1086 1995
Daryl F. Gates’ Police Quest: SWAT 1995
Front Page Sports: Football Pro ’96 Season 1995
Gabriel Knight 2: The Beast Within 1995
The Incredible Machine 3.0 1995
The Last Dynasty 1995
Lode Runner Online: Mad Monks’ Revenge 1995
The Lost Mind of Dr. Brain 1995
Metaltech: Battledrome 1995
Metaltech: Earthsiege – Expansion Pack 1995
NASCAR Track Pack 1995
Phantasmagoria 1995
Shivers (video game) 1995
Space Quest 6: The Spinal Frontier 1995
Thexder 95 1995
Torin’s Passage 1995
Trophy Bass 1995
You Don’t Know Jack 1995
3-D Ultra Pinball: Creep Night 1996
Birthright – The Gorgon’s Alliance 1996
Caesar II 1996
CART Racing 1996
CyberGladiators 1996
Earthsiege 2 1996
Fast Attack: High Tech Submarine Warfare 1996
Flight 1996
Front Page Sports: Trophy Bass 2 1996
Hoyle Bridge 1996
Hoyle Children’s Collection 1996
Hoyle Solitaire 1996
Hunter Hunted 1996
IndyCar Racing II 1996
Leisure Suit Larry 7: Love for Sail! 1996
Lighthouse: The Dark Being 1996
Lords of the Realm II 1996
MissionForce: Cyberstorm 1996
NASCAR Racing 2 1996
Phantasmagoria II: A Puzzle of Flesh 1996
Power Chess 1996
RAMA 1996
The Realm Online 1996
The Rise & Rule of Ancient Empires 1996
Robert E. Lee: Civil War General 1996
Silent Thunder 1996
Space Bucks 1996
Stay Tooned! 1996
The Time Warp of Dr. Brain 1996
Total Meltdown 1996
Urban Runner 1996
You Don’t Know Jack XL (X-Tra Large) 1996
3-D Ultra Minigolf 1997
3-D Ultra Pinball: The Lost Continent 1997
Betrayal in Antara 1997
Front Page Sports: Baseball Pro ’98 1997
Front Page Sports: Golf 1997
Front Page Sports: Trophy Rivers 1997
Grant – Lee – Sherman: Civil War 2: Generals 1997
Diablo: Hellfire 1997
Hoyle Poker 1997
Lords of Magic 1997
Lords of the Realm II: Siege Pack 1997
NASCAR Grand National Series Expansion Pack 1997

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the game releases!

Plus, receive special insider, behind the scenes, sneak peeks and interviews as the game is being made. Don’t worry. We will not spam you, and we will not flood your box with too many emails.
 — Ken Williams

Credits     |     Video produced by: Rock Steady Media     |     Teletype photo: Arnold Reinhold     |     PDP-11 photo: Trammell Hudson