5 ★ (0)
4 ★ (0)
3 ★ (0)
2 ★ (0)
1 ★ (0)

Originally titled, " Passage to Transylvania", Cryptic Passage for Blood (Game) is an expansion pack by Sunstorm Interactive for Monolith Productions' first person shooter, "Blood". It was the first expansion released for the game and the only officially sanctioned third party expansion pack released for Blood. Being released prior to Monolith's own "Plasma Pak" expansion, none of the new enemy types were able to be included, though the game did include a new episode, additional multiplayer levels and a brand new ending cinematic(essentially a slideshow).
The storyline is set at an unspecified period of time after the events of the first game with Caleb (Character) setting out to retrieve a scroll that was stolen from him by an ancient god. While the story isn't referenced throughout any other Blood materials and despite being developed by a third party, the events of Cryptic Passage are considered canon.
Including the hidden secret level, ten new single player levels comprise the Cryptic Passage episode. The levels are more varied than those found in the Plasma Pak expansion and each has a specific theme or style attached to it.
Four "BloodBath" (multiplayer) levels were included with the package as well:
Emil Pagliarulo from Adrenaline Vault wrote one of the most positive reviews for Cryptic Passage, stating that the fresh themes for the expansion were in many ways better than the original game. He criticized "The Lost Monastery" as one of the weaker maps of the pack but still felt that it was well designed and had solid enemy placement. The rest of his review praised each level in detail, ultimately culminating in an overall review score of 90/100 (link). Gamespot reviewer Stephen Poole had an overall similar impression of the expansion, but felt that the underwater areas were slightly too numerous, criticized the game launcher and install times and was equally disappointed in the ending (link).
Computer Games Magazine wrote the most negative review, stating:
"If you really played all the way through Blood and you still want more, it may be time to think about expanding your horizons. But if you're seriously determined to stick with Blood, Monolith themselves are working on an add-on, and it's bound to be more interesting than this package. It could hardly be less. Add the lack of originality to the lack of quantity and you get a lack of desirability. Skip this one."
"Boggy Creek", "Steamboat" and "Gothic Library" would later be remade in the ZDoom engine as part of the ZBlood project. ZBlood is a 25 level, Blood-themed, total conversion for Doom II using the ZDoom engine's enhanced features to better simulate various attributes of the Build engine, though it lacks proper room above room support. Levels have been redesigned around the limitations and additional secrets and minor changes have been made to the maps to make them feel "fresher".