Valve has a few reasons why Half-Life 2: Episode 3 never happened

Alyx Vance from Half-Life 2

As a starting point, we created a Half-Life 2 mod for a basic stage set

Alyx Cosplay by QUIKCOSPLAY : r/HalfLife

Until Alyx spoke, everyone assumed they were Gordon Freeman, say Valve

Rebel Alyx [Half-Life 2] [Mods]

Valve reveals VR game 'Half-Life: Alyx' is on its way

Half-Life 2 Mod Swaps Alyx for Star Fox Adventures' Krystal and Her Original Voice Actress

Here's Half-Life 2 running in VR, using Half-Life: Alyx's engine

ArtStation - Alyx Vance (Half Life 2)

Half-Life 2: Episode One