Dangerous Dave in the Haunted Mansion (also known as Dangerous Dave 2 and under the Froggman title, Rooms of Doom) is a 1991 sequel of the computer game "Dangerous Dave".
 It was created by John Romero, John Carmack, Adrian Carmack and Tom Hall.
 It was developed on the "Shadow Knights" engine with some extra code for smoother character movement.
 Also an auto-loading shotgun debuts in the game.
 Many of the features that debuted in this game were carried over to its sequels, "Dangerous Dave's Risky Rescue" and "Dave Goes Nutz!
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Romero Games Ltd. is an independent game studio that was established on August 11, 2015 by John Romero along with Brenda Romero and is located in Galway, Ireland.
 This is the ninth game studio Romero has established in his career, and currently it has released one title while three more are in development.
Loot Drop is a social video game studio based in San Mateo, California.
 It was created by John Romero and Tom Hall with its COO being Brenda Romero.
 Its tagline is "Believe in fun".
id Tech, also known as id Tech 1 or the "Doom" engine, is the game engine that powers the id Software games "Doom" and "".
 It is also used in "Heretic", "", "Strife: Quest for the Sigil", "Hacx: Twitch 'n Kill", "Freedoom", and other games produced by licensees.
 It was created by John Carmack, with auxiliary functions written by Mike Abrash, John Romero, Dave Taylor, and Paul Radek.
 Originally developed on NeXT computers, it was ported to DOS for "Doom"<nowiki>'</nowiki>s initial release and was later ported to several game consoles and operating systems.
Hyperspace Delivery Boy!
 is the first title released by video game production company Monkeystone Games, formed by id Software and Ion Storm founders John Romero and Tom Hall, and Romero's then-girlfriend Stevie Case.
 A puzzle/action game developed for the Pocket PC and released on December 23, 2001.
 The game was later ported to other platforms, including Linux and it saw a respectable amount of commercial success and paved the way for further titles from the producers.
Dangerous Dave is a 1988 computer game by John Romero.
 It was developed for the Apple II and MS-DOS as an example game to accompany his article about his GraBASIC, an Applesoft BASIC add-on, for the UpTime disk magazine.
Bongo's Bash is an Apple II computer game written by John Romero in 1984.
 The first time Bongo's Bash was published was in 1985 by inCider Magazine on their Hot Cider disk product.
 The game listing was used in advertisements by Cauzin Softstrip to demonstrate what kind of software can be quickly scanned into an Apple II.
 Bongo's Bash was then sold to UpTime (disk magazine) in 1987 and published on Volume 12, Number 4.
Alfonso John Romero (born October 28, 1967) is an American director, designer, programmer, and developer in the video game industry.
 He is best known as a co-founder of id Software and designer for many of their games, including "Wolfenstein 3D", "Dangerous Dave", "", "Doom" and "Quake".
 His game designs and development tools, along with new programming techniques created and implemented by id Software's lead programmer John D. Carmack, led to a mass popularization of the first person shooter, or FPS, in the 1990s.
 He is credited with coining the FPS multiplayer term "deathmatch".
Don Greenwood is a board game designer and was a pioneer editor among commercial board-wargaming magazines.
 He began his own fanzine, "Panzerfaust Magazine", which he oversaw from 1967 until 1972.
 He then joined The Avalon Hill Game Company in 1972, and took over editorship of that company's "house organ", "The General Magazine", which office he held until 1982.
 He left Avalon Hill and continued to work in the wargame industry, notably for GMT Games.
 He is the founder of the Origins, Avaloncon, and WBC gaming conventions and remains the WBC convention manager.
 Greenwood is also president of the Boardgame Players Association.
 He was inducted into the Origins Award hall of fame in 1991 and the Charles Roberts Awards Hall of Fame in 1994.
 He was honored as a "famous game designer" by being featured as the king of spades in Flying Buffalo's 2011 Famous Game Designers Playing Card Deck.
Romero Rodrigues Filho (São Paulo, October 1, 1977) is a Brazilian businessman who studied Electric Engineering at the Escola Politécnica da Universidade de São Paulo.
 He was a founder and president of BuscaPé (www.buscape.com), a Group that also includes the companies Bondfaro, Confiômetro, CortaContas, e-Behavior, e-bit, Lomadee, Pagamento Digital, FControl, Pista Certa, QueBarato!
 and SaveMe.
 At the age of 21, Romero created BuscaPé with three partners also from the University: Ronaldo Takahashi, Rodrigo Borges and Mário Letelier.

Question: John Romero created Dangerous Dave and what other famous game for the Apple 2?
Answer: Doom