Games like The Fifth Day
Games like The Fifth Day include Rust, ARK: Survival Evolved, Project Zomboid, Terraria, and 7 Days to Die. We matched them by the tags players give The Fifth Day on Steam (Survival, Open World Survival Craft, Open World, Multiplayer, and Post-apocalyptic): closest matches first, and among equally close ones the better-known games.

Rust
Shared: Survival · Open World · Multiplayer

ARK: Survival Evolved
Shared: Survival · Open World Survival Craft · Open World

Project Zomboid
Shared: Survival · Open World · Open World Survival Craft

Terraria
Shared: Open World Survival Craft · Survival · Multiplayer

7 Days to Die
Shared: Survival · Open World · Multiplayer

Don't Starve Together
Shared: Survival · Open World Survival Craft · Multiplayer

Raft
Shared: Survival · Open World Survival Craft · Multiplayer

Palworld
Shared: Survival · Open World · Open World Survival Craft

Miscreated
Shared: Survival · Open World Survival Craft · Open World

DayZ
Shared: Survival · Open World · Multiplayer

The Forest
Shared: Survival · Open World Survival Craft · Open World

No Man's Sky
Shared: Open World · Open World Survival Craft · Survival

Valheim
Shared: Survival · Open World Survival Craft · Open World

Once Human
Shared: Open World · Survival · Multiplayer

Green Hell
Shared: Survival · Open World Survival Craft · Multiplayer

Deadside
Shared: Survival · Open World Survival Craft · Multiplayer

Hurtworld
Shared: Survival · Open World · Open World Survival Craft

SURVIVAL: Postapocalypse Now
Shared: Survival · Open World Survival Craft · Open World

SCUM
Shared: Open World Survival Craft · Survival · Open World

Days Gone
Shared: Open World · Survival · Post-apocalyptic

Grounded
Shared: Survival · Open World Survival Craft · Multiplayer

Don't Starve
Shared: Survival · Open World Survival Craft · Adventure

TerraTech
Shared: Open World · Open World Survival Craft · Multiplayer

CastleMiner Z
Shared: Survival · Open World Survival Craft · Multiplayer