Wolfenstein is a science fiction first-person shooter video game co-developed by Raven Software, id Software, Pi Studios and Endrant Studios and published by Activision. It is the sequel to Return to Castle Wolfenstein, and uses the id Tech 4 engine. The game was released in North America on August 18, Australia on August 19 and Europe on August 21, in 2009.
The story is set some time after the failure of Operation Resurrection and project Übersoldat. B.J. Blazkowicz has been sent by the OSA to sabotage the Nazi Kriegsmarine warship Tirpitz planning to fire on London. As he fights the Nazis, he comes across a mysterious medallion. The medallion ends up saving his life when it puts up a shield in front of him and manages to protect him from a hail of Nazi bullets. While he managed to fly away to safety and blow up the Nazi warship, he is very interested in the medallion. During a meeting in the OSA headquarters, he learns that the medallion needs crystals called Nachtsonne, found only in Isenstadt, to utilize its full power and that the leader of the excavation is a Nazi general named Victor Zetta. Blazkowicz is sent to Isenstadt undercover. However, it turns out that an unknown informant had told the Nazis he would be there, effectively blowing his cover. He meets up with agents from the Kreisau Circle, and with them, he battles through the train station and makes it to Isenstadt.
In Isenstadt, he meets the brothers Stephan and Anton Kriege who run the Black Market, the place where Blazkowicz can upgrade all of his weapons and powers with gold that he earns from missions, or finds scattered throughout the game. He also meets the leader of the Kreisau Circle, a former schoolteacher named Caroline Becker. Becker sends Blazkowicz onto a mission into the digsite, where he finds a young Russian named Sergei Kovlov. He also finds an exact copy of the medallion that he found on the Nazi warship, which Kovlov calls the Thule Medallion. Kovlov introduces Blazkowicz to the Golden Dawn, a group of scholars who specialize in the occult, led by Dr. Leonid Alexandrov. He also shows Blazkowicz how to use the Thule Medallion. With a crystal that Kovlov gives to him, he is able to enter the Veil, a barrier between his dimension, and a dimension known as the Black Sun. Using the Veil, he manages to escape. As Blazkowicz completes more missions, he gains new weapons and new powers for his Thule Medallion. Eventually, he manages to kill General Zetta, who turns out to be a monster when viewed through the Veil. The Black Market, the Kreisau Circle, and the Golden Dawn all move out to a new location in Isensadt afterwards, to escape retaliation for Zetta's death.
Shortly after the move, Caroline Becker is captured and held in a nearby castle. Blazkowicz helps the Kreisau Circle stage a rescue mission and confronts Zetta's replacement, Wilhelm “Deathshead” Strasse, who is eager for revenge after the events of Return to Castle Wolfenstein. During a struggle, Caroline is killed by Hans Grosse, Deathsheads's henchman.
After Blazkowicz returns to Isenstadt, Stephan Kriege tells him that he has shot his brother dead for being a mole and betraying both Blazkowicz and Caroline. Finally, Blazkowicz sneaks onboard a Zeppelin after he finds out that a Nazi super weapon, powered by Black Sun energy, is getting ready to fire from it. On it, he finds out that Dr. Alexandrov is also a mole, but his treachery is repaid by an execution at the hand of Hans Grosse. Deathshead and Grosse go into the Black Sun through a portal that Nazi scientists had excavated and reassembled, in order to prepare the weapon. Blazkowicz jumps in after them, and fights Hans Grosse, who greets him in a mechanical suit outfitted with two chainguns (recreating his earlier appearance in Wolfenstein 3D), and a Thule Medallion identical to Blazkowicz's, in order to guard the machine that powered Deathshead's superweapon. Blazkowicz kills Hans Grosse by jamming the Nachtsonne crystals from his medallion into Hans's, and destroys the machine, but Deathshead flees through the portal before B.J. can capture him; the explosion takes out both the portal and the Zeppelin on the other side, effectively destroying all ways of accessing the Black Sun. Due to this, B.J.'s Thule Medallion is rendered useless as well. In a post-credits cutscene, Deathshead is seen clambering out of the Zeppelin wreckage, screaming in frustration.