As a standalone expansion released in 1992, this first-person shooter prequel maintains the core, fast-paced shooting mechanics of its predecessor but presents the action as one continuous episode. You play as B.J. Blazkowicz on a mission to infiltrate Castle Wolfenstein and reclaim the legendary Spear of Destiny from Hitler. While the engine and basic combat are familiar, this version introduces new bosses, an additional enemy type, and a large ammo pickup, offering a focused, uninterrupted adventure within the established WWII setting.
The gameplay remains rooted in fast-paced, maze-crawling first-person shooting, requiring players to navigate complex, heavily guarded Nazi strongholds. The arsenal and standard enemy types will feel familiar to those acquainted with the original setting, emphasizing quick reflexes and resource management across its Adventure and Shooter genres.
However, this standalone experience introduces specific variations to the formula. While the core combat loop is consistent, the level structure is notably different, offering one continuous campaign rather than episodic releases. This design choice provides a different pacing experience for the entire adventure.
To differentiate itself from the base game, this expansion features new challenges integrated throughout the campaign. Key additions include several new boss encounters designed to test the player's skills against unique adversaries. Furthermore, a new type of standard enemy has been introduced to keep players on edge, alongside a new pickup item—a large box of ammunition—to aid in sustained combat operations.
As a standalone expansion, this title is fully playable without requiring ownership of the original game. It exists as a complete, self-contained narrative prequel set within the same historical and atmospheric context. While it shares the engine and general feel, its scope is defined by its single, continuous episode structure, offering a focused journey toward confronting an already unbalanced Hitler.
This specific release does not feature any downloadable content (DLCs) or subsequent expansions released after its initial launch. It stands as a complete package featuring its unique set of levels and additions across its DOS and iOS platform availability.

Mission 2: Return to Danger is an "accessory pack" to Spear of Destiny released by FormGen Corporation in May 1994, which, along with the similar Mission 3: Ultimate Challenge have been called the Mission packs of Spear of Destiny. Six weeks after the Spear of Destiny has been brought out of enemy hands, the Axis mounts a successful commando raid to recover it! After a bloody battle and narrow escape, it's taken to the Nazis' Secret Scandinavian Base, excavated from the solid rock of a fjord. The fortress is said to be impregnable! The Nazis have recaptured the Spear of Destiny and taken it deep in the heart of their Secret Scandinavian Base. The base was built to carry out top secret scientific research, with the ultimate goal of creating an atomic bomb. B.J. Blazkowicz is once again called upon to infiltrate the heavily guarded base and retrieve the Spear.

Mission 3: Ultimate Challenge is an "accessory pack" to Spear of Destiny released by FormGen Corporation in May 1994, which, along with the similar Mission 2: Return to Danger has been called the Mission packs of Spear of Destiny. As the Allies' top agent, you face your toughest challenge yet! Learning from his past mistakes, Hitler has expanded his subterranean command bunker beneath the chancellery in Berlin so that he can keep the Spear of Destiny nearby and well-guarded! Calling upon the dark forces of the occult, Hitler can see into the future and obtain the plans to future weapon systems! Having recaptured the Spear once again, Hitler has made a blood pact with the demon Abigor and has gained knowledge of future weapons systems. He has started developing them in his subterranean bunker. B.J. Blazkowicz is tasked to yet again retrieve the Spear and put an end to the Nazis' mad plans.