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

Valve has explained why we never got Half-Life 2: Episode 3.

Valve Explains Why Half-Life 3 and Left 4 Dead 3 Were Canceled

New Half-Life 2: Episode 4 Screenshots Show Detailed In-Game Levels From the Canned Title

Half-Life: Alyx' is proof Valve answers to no one

Half-Life 2: Episode 3 creator reflects on reception, one year after release

Half-Life 2: Episode One' VR Support Coming in March from Team Behind 'HL2 VR Mod

Half-Life 3 – the game that doesn't exist, Games

Valve, seriously, where is Half-Life 3?

Half-Life 3 cancelled in 2015 as story and gameplay details leak : r/gaming

Some Levels from Half-Life 2: Episode 3 Released

Half Life 3 Rumors Timeline: a History of the Long-Awaited Game That Never Was

Half-Life 2: Episode 4 footage emerges a decade after it was canceled

That's how HL2E2 ends?? I realize now why you've all have been asking for Half-Life 3 so much. Can't wait to play Alyx once I upgrade my pc : r/ HalfLife

Inside source claims 'Half-Life 3' doesn't exist

Why Valve Gave Up On 'Multiple' Half-Life 3s

Why Valve Never Made Half-Life 2: Episode 3 - IGN