"Blood 2: The Chosen uses Monolith’s LithTech - one of the most advanced next-generation 3D engines in gaming... LithTech’s features give you the power to blow up walls, knock down buildings, scar surfaces with explosions and bullets, and interact with objects far beyond the level of simply collecting keys and destroying things. Destroy or interact with EVERYTHING if you want to survive! "
--Blood II: The Chosen website
'LithTech' (formerly known as the "Direct Engine") is a true 3D engine originally created by Monolith Productions in collaboration with Microsoft and is now updated by a subsidiary company called Touchdown Entertainment, previously known as LithTech Inc. An early version powered Blood II: The Chosen and its expansion pack. More recently it has been used in the popular F.E.A.R., its expansions, and its sequel. Though originally the version used in Blood II was only for Microsoft Windows, it was ported to GNU/Linux, Mac OS X, and AmigaOS systems for the Hyperion Entertainment ports of Shogo: Mobile Amour Division.
 LithTech in Blood II
The original version of LithTech was used in Blood II: The Chosen as well as in its sister game Shogo: Mobile Amour Division. The original version included a LithTech software renderer and a DirectX renderer to take advantage of 3D graphics cards (this was converted to OpenGL for the various Shogo ports). LithTech, in a similar vein to the id Tech engines, stored its level, sound and data files in one central package (REZ files). These REZ files could be edited, removed, or created from scratch to create custom levels or mods. LithTech has the support for multiple player modes, such as the various MCAs in Shogo and the playable four Chosen in Blood II.
It also allowed for some adaptation for events during cutscenes, a relatively new feature at the time. The source code for LithTech was released under certain conditions to allow greater freedom for mod developers. LithTech was also in many ways a spiritual successor to the Build engine used in Blood. Like in other titles from that engine, the characters of Caleb, the other Chosen, and Sanjuro have a variety of taunts and dialogue throughout the games, and most objects in the games can either be destroyed and/or interacted with. Another singular feature was its early use of ingame physics, such as in Blood II with the return of head soccer and also movable objects which could even be thrown around using the Singularity Generator or grabbed and and dragged with the "G" key.
Although it was not as advanced as other contemporary engines in some areas, LithTech was complimented for its ease of programming: this was a direct result of its development history, being originally planned as part of DirectX and a programming system originally conceived as a way to simplify game development. There is an interesting difference in perception on this version of the engine: some people saw it as the "poor man's engine", used by those who could not get the id tech or Unreal engines, while other saw LithTech as a strong engine in its own right which was just as, if not more, advanced than its contemporaries. The main problem faced with this version was networking code which took a lot of patches and other upgrades to try and sort it out.
The head engineer behind the LithTech engine, Mike Dussault, is honoured in both games. In Blood II his name can be found as one of the inhabitants of the Cabal Safehouse, and in Shogo there is a minor character named after him. The promotional video for LithTech (see "External Links) showed scenes from Blood II and "Riot" (now Shogo: MAD) as well as scenes from two never released titles called "Claw 3D" and "Draedon". The former appears to have been a third-person puzzle game based on the earlier Monolith title, and the latter appeared to be third-person medieval fantasy fighting game.
 See Also
- Blood II: The Chosen and The Nightmare Levels: the Blood game and expansion pack that was powered by LithTech.
- Shogo: MAD: the Blood II sister game that was also powered by the same version of LithTech.
- Build: the engine used in Blood and its Cryptic Passage, and the Plasma Pak expansion packs.
- ZDoom: the engine that is used in the fan made ZBlood.
- Dark Places: the engine used in the fan made Blood remake Transfusion.
- Doom: the engine used in the fan made Blood TC.
- Flash: the internet software plugin that powers the fan made The Flesh Game.
- Game Maker: the tool used in the fan made Blood Reborn and Blood 2D.
- Windows Animation Package 32: the other in-house Monolith engine.
 External Links
- LithTech on Wikipedia
- LithTech 1.0 Promotional Video on YouTube
- Machinima.com - Lithtech overview
- 3D SPOTLIGHT - Shogo: MAD review (Contains information on LithTech)
- Inside Mac Games - On the LithTech Engine
- Firing Squad - LithTech on Linux
- Lithtech covered by Maximum PC
- 3-D Game Engines Battle for Dominance, Computer Shopper, November 1, 1998, by Will Workman (partial archive)
- Blood II: The Chosen Shareware (See LithTech in Action!)
- Blood II: The Chosen Source Code
- Blood II: The Chosen Source Code(2nd Link)
- Blood II: The Chosen Modification Tools
- Shogo: Mobile Armour Division Shareware (Microsoft Windows)
- Shogo: Mobile Armour Division Shareware (GNU/Linux)
- LithTech ABC model plugin for MilkShape 3D