Missing Information

Missing Information is a single-player modification based on the cut content from the leaked Half-Life 2 Beta. The current version is 1.5.1.

Features
The first version released in 2006, version 1.4, features the content shown at E3 2003 including Traptown and the Borealis chapter, though in an incomplete stage. It is the only released mod so far to showcase material from the leak.

It also showcases cut character skins, models, maps, NPCs, and most of the original weapons, such as the Physgun, which was also revived by other mods, such as Garry's Mod.

The second version released in 2008, version 1.5, is an Orange Box enhanced version of 1.4 with two new E3 2002 demo maps, "Terminal" and "Depot". It also has a few new models, like a new Shotgun model based on the Beta one.

List of patch fixes
The latest 1.5.1 patch did the following things:
 * Fixed stalker and assassin textures and added phong.
 * Phong’d the Borealis barrels.
 * Fixed a few problems with the new Odell model.
 * AK-47 has it’s own sounds instead of using the OICW fire sounds.
 * Improved AK-47 accuracy and fire modes.
 * Increased SMG2 rate of fire and accuracy.
 * Updated SMG2 and OICW sounds.
 * Added mi_buildingblocks to the chapters menu.
 * Updated Borealis chapter with HDR and improved areas.
 * Re-added missing maps and updated a few of them.
 * Added new flare item model.

Legal status
The mod has not been sanctioned by Valve, being described as "illegal content," and official permission has not been given for the redistribution of modified versions of the original leaked material.