Urdnot Wrex

Creation and development

Associate art director Matt Rhodes drew inspiration for the faces of krogan from bats after drawing various different animal species. Originally, their eyes were located on the sides of their heads. However, as they were being modeled the modeler noted that this was a trait of prey animals; thus, the eyes of the krogan were moved to the front to match their predatorial nature. This had the benefit of both making their design more believable, and worked better in conversation.

As a battle-hardened race, something akin to a thick chitin exoskeleton was given to the race. Limits were brought as krogan still had to fit into a human skeleton for animation purposes, a problem with many of the races. As the back area of a race was a "safe" area, allowing designers to play with the silhouette without negatively impacting combat animation and conversations, it was often greatly increased for bigger races like the krogan. The heavy skin of an Indian rhinoceros was used as the reference for the krogan's body.

In order to distinguish Wrex from other krogan, his head was given a "splash" of red color as well as deep scarring. These scars across also demonstrated his combat experience.

Steven Barr voiced Wrex in each game. In the first game, senior writer Mac Walters focused on the character in addition to Garrus Vakarian.

Mass Effect

Wrex makes his debut appearance in 2007's Mass Effect. A bounty hunter, Wrex is hired by the Shadow Broker to assassinate Fist, a former agent who had defected to the rogue Council Spectre, Saren. Wrex is first seen trying to intimidate his way through Chora's Den, where Fist is based, but is unsuccessful. Later, Commander Shepard meets with Wrex, looking for Fist as well. Wrex agrees to join Shepard, since they share a common goal. When Fist is found, after he tells them that he sent a quarian who had information on Saren to meet with agents of the Shadow Broker, who were going to kill her, Wrex fulfills his contract by killing Fist. After a brief reprimand from Shepard, they then invite Wrex to join their team, which he accepts, and spends his time in the cargo bay of the Normandy. In conversations with Shepard, Wrex talks about how he used to be a "battlemaster", which holds him in high regard in the krogan military, but the constant wars between the clans of the krogan homeworld, Tuchanka, brought forth by the genophage, caused him to leave, with the final straw being that Wrex's own father tried to kill him. Wrex also reveals that he was hired by Saren before, but during the mission with him, Wrex felt uneasy about Saren and left. Wrex's uneasiness with Saren proved accurate, as everyone else that Saren had hired for the mission ended up dead.

During the mission on Virmire, salarian Major Kirrahe tells Shepard that Saren has created a cloning facility, meant to try to cure the krogan genophage, a bioweapon created by the salarians to alter krogan fertility rates, to keep krogan populations in check. When Kirrahe talks of destroying the facility, Wrex vehemently protests. Shepard then confronts Wrex, trying to reason with him that the facility needed to be destroyed. This causes Wrex to draw his gun on Shepard. At this point, based on the player's choices, Shepard can either convince Wrex that the krogan clones will just be slaves for Saren's army—which Wrex will agree with, and stand down—or Wrex will refuse to fall in line, and either Shepard or Ashley Williams will be forced to kill him.

Mass Effect 2

The character returns in 2010's Mass Effect 2, though is not available as a squadmate. If the player imports a Mass Effect save where Wrex was recruited and is still alive, he will appear on the krogan homeworld of Tuchanka and greet Shepard warmly on arrival. He will reveal he united many krogan clans under Clan Urdnot, and is instigating reforms as leader to prevent the krogan's eventual destruction. Should the player perform Grunt's loyalty mission, which involves letting Grunt join Clan Urdnot, Shepard will talk to Wrex and must then help Grunt on his "rite of passage". In Mordin's loyalty mission, he will point Shepard to a scout to continue it. Alternatively, if the player imports a save where Wrex died or was not recruited, his more bloodthirsty traditionalist brother Wreav will appear in his stead.

Mass Effect 3

If a save where Wrex is alive and was recruited is imported again, Wrex will appear in the trilogy's third game. He will appear as the leader of the krogan, and appears as part of a questline to cure the Genophage. In the Citadel downloadable content, he becomes a party member for the DLC's duration.

Mass Effect: Foundation

Wrex appears in the second Foundation issue.

Reception

Prior to the release of the first game, Ray Muzyka, CEO of BioWare, believed that Wrex would prove one of the more popular squadmates. In addition, lead designer Preston Watamaniuk has called him his personal favourite character in the trilogy.

Upon release, Wrex received a positive reception. In a list of 50 characters, Gameplayer called him the sixth best Xbox character, praising "his no-nonsense approach, cool head, and poignant speeches". Tom Francis, writing for PC Gamer, wanted to see Wrex most out of all returning characters in Mass Effect 3, noting his popularity in how him simply saying "Shepard" had become a meme. In an article for Game Informer, Jeff Marchiafava named him the fictional character he'd bring round for Thanksgiving if he could.

Wrex is well-regarded as a party member. Official Xbox Magazine awarded him "Sidekick of the Year", saying "Brilliant dialogue, pitch-perfect voice acting, and incredible comic timing made Wrex the most charming, fun, and just plain cool giant armored lizard we’ve ever (virtually) met." VideoGamer.com's list of "Top 10 Video Game Companions" placed him seventh and called him their favourite Mass Effect character, noting the humour in his bloodlust. Adam Biessener of Game Informer listed him second in his "The Top 5 Wingmen Of The Decade" article, commenting how his quality of writing separated him from other stereotypical "brusiers". GameZone's Dakota Grabowski placed him sixth in his list of top BioWare companions, noting the "entertainment value" in his conversations. Similarly Steven Hopper, for IGN, listed him as the third best squadmate in the Mass Effect games, calling him "stubborn" and "tough as nails". In IGN's reader-vote for "the ultimate RPG party", Wrex was the twelfth most requested.

In a look at different RPG archetypes, GamesRadar's Lucas Sullivan called the character an example of the "Grizzled Veteran".

His stand-off and potential death scene in the first game drew attention. Ryan Hodge, writing for GamesRadar, called it one of "gaming's most heartbreaking betrayals", commenting "The most heartbreaking part of Wrex's betrayal is he didn't want to do it. He wasn't evil all along or even being coerced." In an article titled "The Toughest Life Or Death Choice In The Gaming Universe", Kotaku's Stephen Totilo called the choice "shocking", noting how there was no obvious right answer to the dilemma. Toby McCasker, writing for IGN, felt a "pang of uncertainty" when he had his character kill Wrex, not due to the "brutality" of it, but rather pointing out how it felt incongruous to the story, as if he made the "wrong" choice. He then noted a sense of "narrative displacement" again when meeting Urdnot Wreav in the second game.