Operation Black Mesa

Operation Black Mesa is an upcoming modification for Half-Life 2 and a complete Source conversion of Half-Life: Opposing Force. It is considered a companion to Black Mesa, however, the developers are not associated with the developers of Black Mesa.

Details
A list of features planned for the final release:


 * Complete re-creation of all 12 chapters from the original.
 * Models that push the limits of the Source engine.
 * Multiplayer, including Deathmatch and Team Deathmatch with all the original levels fleshed out.
 * New voices, sounds, and visuals.
 * Level design tweaks to utilize the advanced physics engine introduced in Half Life 2.
 * A remixed soundtrack including enhanced music from the original along with new ones.
 * Extended single player experience, with new areas and new monsters filling in gaps left in the original.
 * New scripted scenes.
 * A "capture the flag" mode may be included, but not in early releases.

Awards

 * Mod DB – Top Unreleased Mod for 2007 (5th place)
 * Mod DB – Honorable mention for Top Unreleased Mod for 2009