Back 4 Blood surpasses 10 million players, 'Tunnels of Terror' expansion launches April 12 - Gematsu

Back 4 Blood’s first major downloadable content expansion, “Tunnels of Terror,” will launch on April 12, publisher Warner Bros. Games and developer Turtle Rock Studios announced.

Back 4 Blood: Tunnels of Terror review --- Bloody useless

BACK 4 BLOOD: TUNNELS OF TERROR DLC Review: A Good Start — GameTyrant

Turtle Rock Studios - Gematsu

Back 4 Blood reaches 10 million players, Tunnels of Terror

Back 4 Blood has seen 10 million players since release, first DLC

News - August, 2023

Back 4 Blood - Gematsu

Back 4 Blood's Tunnels of Terror DLC brings a new co-op mode, more

ArtStation - Back 4 Blood DLC: Tunnels of Terror (2022)

Back 4 Blood - Gematsu

Back 4 Blood opens its Tunnels of Terror DLC on April 12 – Destructoid

Turtle Rock Studios - Gematsu