Gabe Newell - Combine OverWiki, the original Half-Life wiki and Portal wiki

White Forest, Half-Life Wiki

Future of the Half-Life series - Combine OverWiki, the original Half-Life wiki and Portal wiki

Gabe Newell is doing an AMA today so you can ask him about Half-Life 3 - Polygon

The Unseen Inbetween Variants of Dr. Breen and Alyx Vance : r/HalfLife

Chell from Portal was supposed to appear/play a big role in a Half-Life game (look the comments for my full message) : r/HalfLife

Mr. Friendly - Combine OverWiki, the original Half-Life wiki and Portal wiki

Mike Morasky - Combine OverWiki, the original Half-Life wiki and Portal wiki

Half-life 3 Theory – Custodi Exitus

Valve Cut Content