Games like Dead Island 2
Games like Dead Island 2 include Left 4 Dead 2, Dying Light, Warhammer 40,000: Darktide, Killing Floor 2, and Resident Evil Requiem. We matched them by the tags players give Dead Island 2 on Steam (Zombies, Gore, First-Person, Action-Adventure, and Post-apocalyptic): closest matches first, and among equally close ones the better-known games.

Left 4 Dead 2
Shared: Co-op · Zombies · Gore

Dying Light
Shared: Zombies · Horror · First-Person

Warhammer 40,000: Darktide
Shared: Co-op · Gore · FPS

Killing Floor 2
Shared: Zombies · Gore · Post-apocalyptic

Resident Evil Requiem
Shared: Zombies · Horror · First-Person

Back 4 Blood
Shared: Zombies · Gore · Co-op

Left 4 Dead
Shared: Co-op · Zombies · Horror

Killing Floor 3
Shared: Co-op · Zombies · First-Person

Call of Duty®: Black Ops III
Shared: Zombies · Co-op · First-Person

Killing Floor
Shared: Zombies · Co-op · Horror

The Outlast Trials
Shared: Co-op · Horror · First-Person

Dying Light: The Beast
Shared: Zombies · First-Person · Horror

Resident Evil Village
Shared: First-Person · Zombies · Horror

Contagion
Shared: Co-op · Zombies · Post-apocalyptic

The Forest
Shared: Horror · First-Person · Adventure

Dead by Daylight
Shared: Gore · Co-op · Horror

Resident Evil 7 Biohazard
Shared: First-Person · Horror · Gore

Call of Duty: World at War
Shared: Zombies · Co-op · First-Person

After the Fall®
Shared: Co-op · Zombies · Gore

Zombie Army Trilogy
Shared: Co-op · Zombies · Gore

World War Z
Shared: Zombies · Co-op · Gore

Far Cry® 5
Shared: Co-op · Action-Adventure · First-Person

Resident Evil Revelations 2
Shared: Zombies · Co-op · Horror

DayZ
Shared: Zombies · Post-apocalyptic · Horror