Russell - Combine OverWiki, the original Half-Life wiki and Portal wiki

Advisor Pod, Half-Life Wiki

Antarctic Researcher - Official TF2 Wiki

Half-Life and Portal universe, Half-Life Wiki

Gonarch, Half-Life Wiki

Expiration Date - Official TF2 Wiki

Ex Valve dev Matt Wood on the HL and Portal cross over, Valve planned big things back in 2006-7 with HL and Portal, Gabe said in 2007 Chell will have a relation with Half-Life characters : r/HalfLife

I found this on a post from r/HalfLifeLounge. Can someone please try to explain these topics to me? : r/HalfLife

Advisor Platform, Half-Life Wiki

The Finest Mind of His Generation, Russell

Resonance Cascade, Half-Life Wiki

Combine OverWiki (@CombineOverWiki) / X

What is better, Half Life or Portal? - Quora