The mod is known for the numerous enhancements it introduces to the engine, including:
- In-game messages
- Switches that open pushwalls or turn on/off turrets.
- Fire-shooting turrets (similar to the ones in Rise of the Triad)
- Textured floors and ceilings, plus the ability for the floor and ceiling to change when players teleport to other parts of the map
- Sky and falling snow and rain in "outdoor" areas
- 12 secret levels (4 secret, 4 super-secret and 4 Challenge levels)
- Special enemies with reanimating capability
- New Artifacts with the ability of increasing the knife's power to the maximum, killing anybody who touches it, or regenerating the player's health unlimited times
- Special themed levels with timer or extra objectives
- 7 different weapons
- Improved enemy AI: certain enemies are much smarter and tactical, they can teleport via Artifacts, or heal themselves by picking up certain health restore items
- Friendly fire, enemies can accidently kill each other
- Interactive scenery objects
- Extreme difficulty level with unlimited lives but limited savegames
After the events of Spear Resurrection, the Spear of Destiny was thrown into the ocean, presumably never to be seen again. The Nazis, however, have recovered the Spear and taken it to their last stronghold - a large estate somewhere in Spain, complete with a heavily guarded mansion. Unlike in its prequel, Spear Resurrection, the Nazis do not seem to plan the resurrection of Adolf Hitler, and it is unclear what are their plans regarding to the Spear.
B.J. Blazkowicz travels to the Nazi-occupied estate, with the intent of putting an end to their meddling with the holy relic, which is in possession of Heinrich Haufmann, a leftover high-ranking Nazi officer from the Third Reich. To obtain the Spear, B.J. must defeat a variety of well-known and new enemies: the Superclone makes a return from Spear Resurrection, as well as a new and formidable companion, the Ultraclone, which is capable of reanimating itself upon destruction. Cybronic killing machines named Cybertroopers will also make an appearance several times, as well as Heinrich Haufmann's right-hand man, Otto von Thugg.