Games like Cataclysm: The Last Generation
Games like Cataclysm: The Last Generation include Project Zomboid, SKYHILL, 7 Days to Die, Kenshi, and ZED ZONE. We matched them by the tags players give Cataclysm: The Last Generation on Steam (RPG, Simulation, Roguelike, Traditional Roguelike, and Post-apocalyptic): closest matches first, and among equally close ones the better-known games.

Project Zomboid
Shared: Survival · Zombies · Post-apocalyptic

SKYHILL
Shared: Survival · Roguelike · Post-apocalyptic

7 Days to Die
Shared: Survival · Zombies · Post-apocalyptic

Kenshi
Shared: RPG · Survival · Simulation

ZED ZONE
Shared: Survival · Post-apocalyptic · Zombies

Home Behind 2
Shared: RPG · Roguelike · Simulation

Dead Age
Shared: RPG · Zombies · Survival

Terminus: Zombie Survivors
Shared: Roguelike · Survival · Zombies

NEO Scavenger
Shared: RPG · Roguelike · Post-apocalyptic

Elin
Shared: RPG · Roguelike · Traditional Roguelike

Stoneshard
Shared: RPG · Roguelike · Survival

Miscreated
Shared: Survival · Post-apocalyptic · Zombies

VEIN
Shared: Survival · Zombies · Post-apocalyptic

Fallout: New Vegas
Shared: RPG · Post-apocalyptic · Sci-fi

Don't Starve Together
Shared: Survival · RPG · Simulation

State of Decay: YOSE
Shared: Survival · Zombies · Post-apocalyptic

Wayward
Shared: Roguelike · Survival · RPG

Cataclysm: Dark Days Ahead
Shared: RPG · Traditional Roguelike · Roguelike

Fallout 4
Shared: RPG · Post-apocalyptic · Adventure

Survival Log
Shared: Simulation · Post-apocalyptic · Survival

Graveyard Keeper
Shared: RPG · Simulation · Crafting

Rust
Shared: Survival · Crafting · RPG

DayZ
Shared: Survival · Zombies · Post-apocalyptic

How to Survive
Shared: Survival · Zombies · RPG