Games like Volcan Defend the Tower
Games like Volcan Defend the Tower include Caster, PUBG: BATTLEGROUNDS, Orcs Must Die! 2, Rock 'N' Roll Defense, and Marvel Rivals. We matched them by the tags players give Volcan Defend the Tower on Steam (Indie, Action, Casual, Adventure, and Strategy): closest matches first, and among equally close ones the better-known games.

Caster
Shared: Indie · Action · Adventure

PUBG: BATTLEGROUNDS
Shared: Action · Shooter · Third-Person Shooter

Orcs Must Die! 2
Shared: Action · Indie · Strategy

Rock 'N' Roll Defense
Shared: Casual · Action · Strategy

Marvel Rivals
Shared: Third-Person Shooter · Action · Casual

X-Morph: Defense
Shared: Action · Indie · Strategy

Defense Grid: The Awakening
Shared: Indie · Strategy · Sci-fi

ShellShock Live
Shared: Action · Strategy · Casual

Sanctum 2
Shared: Action · Strategy · Indie

The Bureau: XCOM Declassified
Shared: Action · Third-Person Shooter · Sci-fi

Orcs Must Die!
Shared: Action · Indie · Strategy

Kingdom Rush - Tower Defense
Shared: Strategy · Casual · Action

HELLDIVERS™ 2
Shared: Action · Third-Person Shooter · Shooter

Half-Life 2
Shared: Action · Sci-fi · Adventure

Grand Theft Auto V Legacy
Shared: Action · Adventure · Shooter

STAR WARS™ Battlefront II (Classic, 2005)
Shared: Action · Third-Person Shooter · Shooter

Black Mesa
Shared: Action · Sci-fi · Shooter

Notes of Soul
Shared: Action · Indie · Adventure

Escape From Duckov
Shared: Action · Adventure · Third-Person Shooter

Sanctum
Shared: Action · Indie · Strategy

Warhammer 40,000: Space Marine 2
Shared: Action · Adventure · Third-Person Shooter

Orcs Must Die! 3
Shared: Strategy · Action · Third-Person Shooter

ORION: Prelude
Shared: Action · Indie · Adventure

Aimlabs
Shared: Action · Shooter · Third-Person Shooter