Day of the Tentacle, also known as Maniac Mansion II: Day of the Tentacle, is a 1993 graphic adventure game developed and published by LucasArts. It is the sequel to the 1987 game Maniac Mansion. The plot follows Bernard Bernoulli and his friends Hoagie and Laverne as they attempt to stop the evil Purple Tentacle from taking over the world. The player takes control of the trio and solves puzzles while using time travel to explore different periods of history.
Dave Grossman and Tim Schafer co-led development, their first time in such a role. The pair carried over a limited number of elements from Maniac Mansion and forwent the character selection aspect to simplify development. Inspirations included Chuck Jones cartoons and the history of the United States. Day of the Tentacle was the eighth LucasArts game to use the SCUMM engine.
Day of the Tentacle was released simultaneously on floppy disk and CD-ROM to acclaim and commercial success. Critics focused on its cartoon-style visuals and comedic elements. Day of the Tentacle has featured regularly in lists of the best games, and has been referenced in popular culture. A remastered version was developed by Schafer's current studio, Double Fine Productions, and released in March 2016, for OS X, PlayStation 4, PlayStation Vita, and Windows, with an iOS and Linux port released in July the same year, and then later for Xbox One in October 2020.
Gameplay Day of the Tentacle follows the point-and-click two-dimensional adventure game formula, first established by the original Maniac Mansion. Players direct the characters by clicking with the computer mouse. Players choose from a set of nine commands (such as "pick up", "use", or "talk to") and then on an object in the world. This was the last SCUMM game to use the original interface of having the bottom of the screen being taken up by a verb selection and inventory; starting with the next game to use the SCUMM engine, Sam & Max Hit the Road, the engine was modified to scroll through a more concise list of verbs with the right mouse button and having the inventory on a separate screen.
Day of the Tentacle uses time travel extensively. The three protagonists are separated across time by the effects of a faulty time machine. The player, after completing certain puzzles, can then freely switch between these characters, interacting with the game's world in separate time periods. Certain small inventory items can be shared by placing the item into the "Chron-o-Johns", modified portable toilets that instantly transport objects to one of the other time periods, while other items are shared by simply leaving the item in a past time period to be picked up by a character in a future period. Changes made to a past time period will affect a future one, and many of the puzzles are based on the effect of time travel, the aging of certain items, and alterations of the time stream. For example, one puzzle requires the player, while in the future era where Purple Tentacle has succeeded, to send a medical chart of a Tentacle back to the past, having it used as the design of the American flag, then collecting one such flag in the future to be used as a Tentacle disguise to allow that character to roam freely.
The whole original Maniac Mansion game can be played on a computer resembling a Commodore 64 inside the Day of the Tentacle game; this practice has since been repeated by other game developers, but at the time of Day of the Tentacle's release, it was unprecedented.
Plot Five years after the events of Maniac Mansion, Purple Tentacle—a mutant monster and lab assistant created by mad scientist Dr. Fred Edison—drinks toxic sludge from a river behind Dr. Fred's laboratory. The sludge causes him to grow a pair of flipper-like arms, develop vastly increased intelligence, and have a thirst for global domination. Dr. Fred plans to resolve the issue by killing Purple Tentacle and his harmless, friendly brother Green Tentacle, but Green Tentacle sends a plea of help to his old friend, the nerd Bernard Bernoulli. Bernard travels to the Edison family motel with his two housemates, deranged medical student Laverne and roadie Hoagie, and frees the tentacles. Purple Tentacle escapes to resume his quest to take over the world.
Since Purple Tentacle's plans are flawless and unstoppable, Dr. Fred decides to use his Chron-o-John time machines to send Bernard, Laverne, and Hoagie to the day before to turn off his Sludge-o-Matic machine, thereby preventing Purple Tentacle's exposure to the sludge. However, because Dr. Fred used an imitation diamond rather than a real diamond as a power source for the time machine, the Chron-o-Johns break down in operation. Laverne is sent 200 years in the future, where humanity has been enslaved and Purple Tentacle rules the world from the Edison mansion, while Hoagie is dropped 200 years in the past, where the motel is being used by the Founding Fathers as a retreat to write the United States Constitution. Bernard is returned to the present. To salvage Dr. Fred's plan, Bernard must acquire a replacement diamond for the time machine, while both Hoagie and Laverne must restore power to their respective Chron-o-John pods by plugging them in. To overcome the lack of electricity in the past, Hoagie recruits the help of Benjamin Franklin and Dr. Fred's ancestor, Red Edison, to build a superbattery to power his pod, while Laverne evades capture by the tentacles long enough to run an extension cord to her unit. The three send small objects back and forth in time through the Chron-o-Johns and make changes to history to help the others complete their tasks.
Eventually, Bernard uses Dr. Fred's family fortune of royalties from the use of their likeness in Maniac Mansion to purchase a real diamond, while his friends manage to power their Chron-o-Johns. Soon, the three are reunited in the present. Purple Tentacle arrives, hijacks a Chron-o-John, and takes it to the previous day to prevent them from turning off the sludge machine; he is pursued by Green Tentacle in another pod. With only one Chron-o-John pod left, Bernard, Hoagie, and Laverne use it to pursue the tentacles to the previous day, while Dr. Fred uselessly tries to warn them of using the pod together, referencing the film The Fly. Upon arriving, the trio exit the pod only to discover that they have been turned into a three-headed monster, their bodies merging into one during the transfer. Meanwhile, Purple Tentacle has used the time machine to bring countless versions of himself from different moments in time to the same day to prevent the Sludge-o-Matic from being deactivated. Bernard and his friends defeat the Purple Tentacles guarding the Sludge-o-Matic, turn off the machine, and prevent the whole series of events from ever happening. Returning to the present, Dr. Fred discovers that the three have not been turned into a monster at all but have just gotten stuck in the same set of clothes; they are then ordered by Dr. Fred to get out of his house. The game ends with the credits rolling over a tentacle-shaped American flag, one of the more significant results of their tampering in history.
Development
Following a string of successful adventure games, LucasArts assigned Dave Grossman and Tim Schafer to lead development of a new game. The two had previously assisted Ron Gilbert with the creation of The Secret of Monkey Island and Monkey Island 2: LeChuck's Revenge, and the studio felt that Grossman and Schafer were ready to manage a project. The company believed that the pair's humor matched well with that of Maniac Mansion and suggested working on a sequel. The two developers agreed and commenced production. Gilbert and Gary Winnick, the creators of Maniac Mansion, collaborated with Grossman and Schafer on the initial planning and writing. The total budget was about $600,000, according to Schafer.
Creative design
In planning the plot, the four designers considered a number of concepts, eventually choosing an idea of Gilbert's about time travel that they believed was the most interesting. The four discussed what time periods to focus on, settling on the Revolutionary War and the future. The Revolutionary War offered opportunities to craft many puzzles around that period, such as changing the Constitution to affect the future. Grossman noted the appeal of the need to make wide-sweeping changes such as the Constitution just to achieve a small personal goal, believing this captured the essence of adventure games. The future period allowed them to explore the nature of cause and effect without any historical bounds. Grossman and Schafer decided to carry over previous characters that they felt were the most entertaining. The two considered the Edison family "essential" and chose Bernard because of his "unqualified nerdiness". Bernard was considered "everyone's favorite character" from Maniac Mansion, and was the clear first choice for the protagonists. The other protagonists, Laverne and Hoagie, were based on a Mexican ex-girlfriend of Grossman's and a Megadeth roadie named Tony that Schafer had met, respectively. Schafer and Grossman planned to use a character selection system similar to the first game but felt that it would have complicated the design process and increased production costs. Believing that it added little to the gameplay, they removed it early in the process and reduced the number of player characters from six to three. The dropped characters included Razor, a female musician from the previous game; Moonglow, a short character in baggy clothes; and Chester, a black beat poet. Ideas for Chester, however, morphed into new twin characters in the Edison family. The smaller number of characters reduced the strain on the engine in terms of scripting and animation.
The staff collaboratively designed the characters. They first discussed the character personalities, which Larry Ahern used to create concept art. Ahern wanted to make sure that the art style was consistent and the character designs were established early, in contrast to what had happened with Monkey Island 2, in which various artists came in later to help fill in art assets as necessary, creating a disjointed style. Looney Tunes animation shorts, particularly the Chuck Jones-directed Rabbit of Seville, What's Opera, Doc?, and Duck Dodgers in the 24½th Century inspired the artistic design. The cartoonish style also lent itself to providing larger visible faces to enable more expressive characters. Peter Chan designed backgrounds, spending around two days to progress from concept sketch to final art for each background. Chan too used Looney Tunes as influence for the backgrounds, trying to emulate the style of Jones and Maurice Noble. Ahern and Chan went back and forth with character and background art to make sure both styles worked together without too much distraction. They further had Jones visit their studio during development to provide input into their developing art. The choice of art style inspired further ideas from the designers. Grossman cited cartoons featuring Pepé Le Pew, and the gag involving a painted white stripe on Penelope Pussycat inspired a puzzle. The artists spent a year creating the in-game animations.
The script was written in the evening when fewer people were in the office. Grossman considered it the easiest aspect of production, but encountered difficulties when writing with others around.