Games like Stack Defense
Games like Stack Defense include Counter-Strike 2, Tom Clancy's Rainbow Six Siege, Dota 2, Liars Bar, and VRChat. We matched them by the tags players give Stack Defense on Steam (Action, Multiplayer, eSports, Strategy, and Real Time Tactics): closest matches first, and among equally close ones the better-known games.

Counter-Strike 2
Shared: Multiplayer · Action · FPS

Tom Clancy's Rainbow Six Siege
Shared: Multiplayer · eSports · Action

Dota 2
Shared: Multiplayer · eSports · Strategy

Liars Bar
Shared: Multiplayer · 3D · FPS

VRChat
Shared: VR · Multiplayer · Funny

Counter-Strike
Shared: Action · Multiplayer · FPS

Gorilla Tag
Shared: VR · Multiplayer · Action

Counter-Strike: Source
Shared: Action · Multiplayer · FPS

Supraball
Shared: Multiplayer · Sports · eSports

Pavlov
Shared: VR · Action · Multiplayer

Team Fortress 2
Shared: Multiplayer · Action · FPS

PUBG: BATTLEGROUNDS
Shared: Multiplayer · Action · FPS

Buckshot Roulette
Shared: Multiplayer · Strategy · 3D

LOCKDOWN Protocol
Shared: Multiplayer · Action · FPS

Omega Strikers
Shared: Action · Multiplayer · Strategy

Onward
Shared: VR · Multiplayer · Action

Bodycam
Shared: Multiplayer · FPS · VR

Pro Soccer Online
Shared: Sports · eSports · 3D

PAYDAY 2
Shared: Action · Multiplayer · FPS

KovaaK's
Shared: Action · FPS · Multiplayer

Paladins®
Shared: Multiplayer · Action · FPS

Garry's Mod
Shared: Multiplayer · Funny · FPS

Apex Legends™
Shared: Multiplayer · Action · FPS

ShellShock Live
Shared: Multiplayer · Action · Strategy