Games like Base Defense
Games like Base Defense include 20 Minutes Till Dawn, Bad North: Jotunn Edition, Battlefield™ 2042, Monsters are Coming!, and Nova Drift. We matched them by the tags players give Base Defense on Steam (Action, Tower Defense, Shooter, Action Roguelike, and Shoot 'Em Up): closest matches first, and among equally close ones the better-known games.

20 Minutes Till Dawn
Shared: Action Roguelike · Shoot 'Em Up · Bullet Hell

Bad North: Jotunn Edition
Shared: Tower Defense · Wargame · Action Roguelike

Battlefield™ 2042
Shared: Shooter · Action · War

Monsters are Coming!
Shared: Action · Tower Defense · Action Roguelike

Nova Drift
Shared: Shoot 'Em Up · Action Roguelike · Bullet Hell

PUBG: BATTLEGROUNDS
Shared: Shooter · Action · Survival

BALL x PIT
Shared: Action · Action Roguelike · Shoot 'Em Up

Hades
Shared: Action Roguelike · Action · Hack and Slash

Battlefield™ 6
Shared: Action · Shooter · War

Megabonk
Shared: Action Roguelike · Action · Bullet Hell

Call of Duty®
Shared: Shooter · Action · War

Call of Duty®: Black Ops II
Shared: Action · Shooter · War

Risk of Rain 2
Shared: Action Roguelike · Action · Shooter

Call of Duty®: Black Ops III
Shared: Action · Shooter · Futuristic

Holdfast: Nations At War
Shared: Shooter · Action · Wargame

Star of Providence
Shared: Action Roguelike · Action · Shoot 'Em Up

METAL GEAR RISING: REVENGEANCE
Shared: Action · Spectacle fighter · Hack and Slash

Utopia Must Fall
Shared: Tower Defense · Action Roguelike · Action

Devil May Cry 5
Shared: Action · Hack and Slash · Spectacle fighter

Hades II
Shared: Action · Action Roguelike · Hack and Slash

Death Must Die
Shared: Action Roguelike · Action · Bullet Hell

Arma 3
Shared: Action · Shooter · War

Ghostrunner
Shared: Action · Hack and Slash · Cyberpunk

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Action