SiN

SiN introduced some new features to the first-person shooter genre, such as the ability to knock the weapon out of an opponent's hand and to take area-specific damage from enemies. Although driveable vehicles did not play a big part in the game, there were some sections and levels which required the player to drive certain vehicles, including an all-terrain vehicle, a patrol boat, a forklift, and a helicopter. SiN also featured three different types of body armor - for the legs, for the torso and for the head, with each of them depleting separately according to where the player was getting hit.

SiN featured one of the highest levels of interactivity of any first-person shooter at that time. Much of the environment could be interacted with, computer terminals could be manipulated through a DOS-like command prompt, and various objects could be destroyed. Also, a player's progression through SiN was not entirely linear. Many levels had multiple ways in which to complete them, and actions could trigger drastic changes in future levels. This feature was intended to add a level of replayability to the game and force the player to think before acting. Some of these actions could even force the player to go through an entirely different set of levels while progressing through the game. SiN also contained many Easter eggs, more so than most other games, ranging from some fairly obvious signs and graffiti to entirely hidden rooms and even whole levels.

The AI of the enemies in the game was rather advanced for a game of its time, with the foes being able to run for cover, call for reinforcements, locate the player throughout the levels, respond to specific scripts etc. However, there were some issues with the game code which prevented the enemies from always behaving as intended.

Set in the near future of 2037, many of the levels and locations are reminiscent of their current day equivalents. Banks, building sites, sewage works and other everyday recognizable buildings form the basis of many of the levels in Sin. One major difference in the world of SiN is the lack of a police force. Ten years prior to the game, the police force collapsed due to corruption and ineffectiveness against the rising tide of crime. Private security companies have taken the police's place, with some of them patrolling the streets like the former police, some in charge of protecting their employer's assets.

One of the companies which employ their own armed security forces is SinTek, a large multi-national biotechnology corporation specializing in medical and chemical research, owned by the beautiful and charismatic Elexis Sinclaire. Elexis took over the company following the mysterious disappearance of her father, Dr Thrall Sinclaire, who founded it in 2005.

The protagonist of the game, Colonel John R. ("Rusty") Blade, is the commander of one of the largest security forces in the city of Freeport, HardCorps. Prior to the beginning of the game, Blade is working to rid the streets of a potent new recreational drug named U4, which is rapidly gaining popularity in Freeport and is rumoured to be able to cause genetic mutations to its users. Yet the source of the drug is still unknown, and its effects not entirely studied. As the game begins, the player is placed into the shoes of John Blade as he responds to a full-scale bank heist and hostage situation perpetrated by a well-known Freeport criminal boss, Antonio Mancini. But as the player progresses and pursues the criminal behind the heist, further questions are raised: Who is really behind the heist? And is this linked to the reported appearances of mutants in the city?

Throughout the missions, Blade is aided via radio link by a computer expert working at HardCorps: JC, a skilled hacker, capable of breaking into even the tightest of networks. In fact, Blade had first found out about JC when investigating a cracker who had broken into the HardCorps system. After tracking down the hacker, Blade, recognizing the perpetrator's talents, decided to make him a job offer at HardCorps instead of arresting him. Thus, JC became one of the HardCorps most valuable assets and the only one able to assist them in hacking-based missions.

As the game progresses, it is gradually revealed that the whole bank robbery is funded by Elexis Sinclaire, who in fact only wanted Mancini to steal a safety deposit box from the bank's vault. When she learns that he launched a full-scale bank heist instead, she injects him with concentrated U4 and turns him into a mutant, sending him after Blade. John manages to defeat the huge creature, and afterwards learns that it was, in fact, Mancini himself. Blade also finds out that the substance found in Mancini's body after his death is only manufactured by one company: SinTek. All these unavoidable facts force Blade to embark on an investigation into SinTEK's vast industrial area located in the outskirts of Freeport.

Later, Blade learns that Elexis Sinclaire's main goal is to contaminate the Freeport water system with vast quantities of U4, turning all of the city's inhabitants into mutants. He manages to thwart that plan, but it turns out to be just a diversion because, in the meantime, SinTek's troops steal nuclear warheads from a U.S. military base. Elexis threatens to fill them with U4 and launch them at specific targets, turning the entire world's population into mutants. As Blade becomes aware of that, he heads to SinTek's main base in order to stop Sinclaire. However, once Blade defeats the SinTek's security and mutants at the base, he reaches Sinclaire, only for her to escape by transferring her entire body into a rocket that launches itself into the sky, splits and spreads everywhere. JC is unable to locate them, and in Blade's fury at the escape, he smashes a button, causing the nuclear missiles to abort their launch. Sinclaire disappears through the rockets, never to be seen again.

Development started in 1997, on the Quake engine.[3] When the id Tech 2 engine was completed some months later, the developers switched to that engine. The game demo was found to have a CIH virus infection in one of its mirror links. Activision had advised players only to download the game demo from their website.[4] Due to the amount of patches which made the game more CPU intensive, primary Amiga developer and later AmigaOS developer Hyperion Entertainment had to eventually cancel the AmigaOS version due to the lack of hardware at the time.

A mission pack was released for the game in 1999 by 2015, Inc., entitled SiN: Wages of Sin. The player reprises the role of John Blade, and the story picks up after the conclusion of the main game, pitting the player against Gianni Manero, a notorious crime boss looking to take over Freeport city.

In 2000, ADV Films released a 60-minute anime film, Sin: The Movie. Although loosely based on the game, with similar characters and plot elements, there are some differences. For example, a major character from the game is killed off in the first few moments of the film; also, it takes place in the 2070s, whereas the games take place in the late 2030s.

A sequel, SiN Episodes, was made by Ritual and was intended to be released episodically over Steam network. The only episode, titled "Emergence", was released on May 10, 2006.

An alternate reality game based in the SiN universe was launched in 2005 to promote the announcement of SiN Episodes. Various cryptic puzzles could be found on the website, and solving these would lead to new pieces of media and art. However, support for this piece of viral marketing by Ritual Entertainment did not last, although it has been claimed by Ritual that the final puzzles still remained unsolved.

SiN was re-released on the Steam platform on April 5, 2006 bundled together with SiN Episodes: Emergence. This version of SiN (version 1.12) includes fixes for audio and video playback problems as well as integration with the Steam multiplayer server browser. It was reissued, along with its expansion pack SiN: Wages of Sin, on GOG.com on January 30, 2014, DRM-free and fixed for modern hardware.

Nightdive Studios, a team focused on bringing classic personal computer games to modern systems, acquired the rights to SiN in January 2020.[21] On March 18, 2020, Nightdive re-released SiN on Steam and GOG as SiN Gold, an updated version of the game provided for free to accounts that already owned SiN. SiN Gold incorporates the Wages of Sin expansion pack, adds support for modern resolutions, restores the original game assets, and fixes many bugs.[22]

Additionally, alongside the Gold edition, Nightdive announced plans for a remastered version of SiN to run on their Kex engine, scheduled for release in late 2020 or early 2021. It was announced during 3D Realms’ Realms Deep digital event that the remastered version will be called SiN: Reloaded, and that it will see a release in 2021.[23]

A point-and-click adventure game called Rise of the Dragon that was originally released for DOS in 1990 featured a similar scenario. Rise of the Dragon is set around the middle of the 21st century and also features a protagonist named Blade, though this Blade is an ex-police officer and private investigator. In Rise of the Dragon, a crime syndicate has developed a new drug called MTZ which mutates its users, with a criminal boss even using the drug to punish an underling for a failure by mutating him. The syndicate plans to release MTZ into the city's water supply with the intention of mutating the population. This Blade, like the Blade of SiN, stumbles upon the main plot while dealing with another crime, and fights a powerful mutant as the game's last boss.

• Official website (archive.org)
• SiN at MobyGames