Black Mesa: Candidate Twelve (Echoes remake) mod - Mod DB
Mr. Floyd | ACAB on Twitter: "So for those who don't know, a remake of Half- Life: Echoes is being made in the Black Mesa engine, and I'm honestly pretty hyped about it.
Mod Corner - Half-Life: Echoes - YouTube
HALF-LIFE: ECHOES is getting a FAN REMAKE! - YouTube