Indiana Jones and the Iron Phoenix is a Dark Horse Comics limited series starring the fictional archaeologist Indiana Jones.
 It was the seventh "Indiana Jones" limited series by Dark Horse, and the sixth about the adult Indiana.
 The comic was based on a canceled LucasArts video game, a sequel to "Fate of Atlantis" (which was also the first Dark Horse "Indiana Jones" comic).
Overwatch is an American digital comic series published online by Blizzard Entertainment and republished by Dark Horse Comics' digital service, featuring events surrounding the characters of the "Overwatch" universe.
 The title was launched on April 21, 2016, and has continued to be published with no set schedule.
S.T.A.L.K.E.R.: Shadow of Chernobyl is a first-person shooter survival horror video game developed by GSC Game World and published by THQ.
 The game is set in an alternative reality, where a second nuclear disaster occurs at the Chernobyl Nuclear Power Plant Exclusion Zone in the near future and causes strange changes in the area around it.
 The game has a non-linear storyline and features gameplay elements such as trading and two-way communication with NPCs.
 The game includes role-playing and first person shooter elements.
 In "S.T.A.L.K.E.R", the player assumes the identity of an amnesiac "Stalker", an illegal explorer/artifact scavenger in "The Zone", dubbed "The Marked One".
 "The Zone" is the location of an alternate reality version of the Zone of alienation surrounding the Chernobyl Power Plant after a second fictitious meltdown, which further contaminated the surrounding area with radiation, and caused strange otherworldly changes in local fauna, flora, and the laws of physics.
 "Stalker" in the context of the video game refers to the older meaning of the word as a tracker and hunter of game or guide.
Dark Empire is a "Star Wars" comic book metaseries produced by Dark Horse Comics.
 It consists of a six-issue limited series written by Tom Veitch and drawn by Cam Kennedy ("Dark Empire I"), followed by a second six-issue limited series by Veitch and Kennedy ("Dark Empire II") and a two-issue limited series written by Veitch and drawn by Jim Baikie ("Empire's End").
 "Dark Empire" in particular, is notable for being one of the very first Star Wars comics to be produced by Dark Horse Comics, who had acquired the comic rights to the Star Wars franchise in the early 1990s.
Saints of Virtue is a 3D medieval first person shooter video game developed by Shine Studios and published by Cactus Game Design.
 Released in 1999, it was one of the first Christian first person shooter games, and led to the release of other medieval/ancient FPS games of the same style.
The team-based first person shooter video game "Overwatch", developed by Blizzard Entertainment and released in May 2016, features 25 playable characters (heroes) and a number of supporting characters as part of the game's narrative, which is told through animated media and digital comics outside of the game.
Soldier of Fortune: Payback is a first-person shooter video game and the third installment of the "Soldier of Fortune" game series.
 Unlike the previous two "Soldier of Fortune" games, which were developed by Raven Software utilizing the id Tech 2 and id Tech 3, "Payback" was developed by Cauldron HQ, developed with Cauldron's in-house CloakNT engine, used in their previous first person shooter game, "Chaser".
 It is the first game of the series released for the Xbox 360 and PlayStation 3.
 The game was released on 14 November 2007.
Blackthorne Publishing put out the first six issues of "Roachmill" before creators Hedden and McWeeney were lured away by Dark Horse Comics.
 Dark Horse published an additional ten issues before the series was canceled.
 Dark Horse also published a special introductory Roachmill story in "Dark Horse Presents" No. 17 (April 1988), to announce the acquisition of the character.
Karma: Operation Barbarossa (Korean: 카르마2, and also known as Karma 2) is a free online First Person Shooter game developed by Dragonfly, Futureport, and Blueside, and it is distributed by Dragonfly.
 It is the sequel to Karma Online, which was the first online First Person Shooter game in South Korea.
 Karma: Operation Barbarossa was planned to be published in North America by free-to-play publisher ijji, but has recently been officially canceled.
 However, on March 2011, Joymax picked up the rights to publish the game globally under the name, Karma Online: Prisoners Of The Dead.
In the field of comic books, a limited series is a comics series with a predetermined number of issues.
 A limited series differs from an ongoing series in that the number of issues is finite and determined before production, and it differs from a one shot in that it is composed of multiple issues.
 The term is often used interchangeably with miniseries (mini-series) and maxiseries (maxi-series), usually depending on the length and number of issues.
 In Dark Horse Comics' definition of a limited series, "This term primarily applies to a connected series of individual comic books.
 A limited series refers to a comic book series with a clear beginning, middle and end."
 Dark Horse Comics and DC Comics refer to limited series of two to eleven issues as miniseries and series of twelve issues or more as maxiseries, but other publishers alternate terms.

Question: What was republished by Dark Horse Comics' surrounding the team-based first person shooter video game?
Answer: Overwatch