Games like The Last Stand: Aftermath
Games like The Last Stand: Aftermath include DayZ, Yet Another Zombie Survivors, Left 4 Dead 2, Days Gone, and The Last of Us™ Part I. We matched them by the tags players give The Last Stand: Aftermath on Steam (Zombies, Survival, Post-apocalyptic, Top-Down Shooter, and Roguelite): closest matches first, and among equally close ones the better-known games.

DayZ
Shared: Survival · Zombies · Post-apocalyptic

Yet Another Zombie Survivors
Shared: Zombies · Top-Down Shooter · Roguelite

Left 4 Dead 2
Shared: Zombies · Survival · Shooter

Days Gone
Shared: Zombies · Survival · Post-apocalyptic

The Last of Us™ Part I
Shared: Post-apocalyptic · Zombies · Survival

SurrounDead
Shared: Zombies · Survival · Post-apocalyptic

S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition
Shared: Post-apocalyptic · Survival · Shooter

Metro Exodus
Shared: Post-apocalyptic · Singleplayer · Survival

SKYHILL
Shared: Survival · Post-apocalyptic · Zombies

Fallout 4
Shared: Post-apocalyptic · Singleplayer · Shooter

Project Zomboid
Shared: Zombies · Survival · Post-apocalyptic

20 Minutes Till Dawn
Shared: Survival · Action Roguelike · Roguelite

FatalZone
Shared: Survival · Zombies · Action Roguelike

Left 4 Dead
Shared: Zombies · Survival · Shooter

Escape From Duckov
Shared: Top-Down Shooter · Adventure · Survival

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

The Walking Dead: A New Frontier
Shared: Zombies · Post-apocalyptic · Survival

The Final Station
Shared: Survival · Post-apocalyptic · Zombies

The Last Stand Legacy Collection
Shared: Zombies · Post-apocalyptic · Survival

Deadlight
Shared: Zombies · Post-apocalyptic · Adventure

METRO Last Light Redux
Shared: Post-apocalyptic · Survival · Singleplayer

ZERO Sievert
Shared: Survival · Post-apocalyptic · Shooter

The Binding of Isaac
Shared: Action Roguelike · Indie · Top-Down

METRO 2033 Redux
Shared: Post-apocalyptic · Singleplayer · Shooter