Games like VALDIS
Games like VALDIS include PUBG: BATTLEGROUNDS, They Are Billions, Resident Evil 4, Plants vs. Zombies GOTY Edition, and Orcs Must Die! 3. We matched them by the tags players give VALDIS on Steam (Tower Defense, Third-Person Shooter, Zombies, Strategy, and Action): closest matches first, and among equally close ones the better-known games.

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

They Are Billions
Shared: Zombies · Strategy · Base Building

Resident Evil 4
Shared: Third-Person Shooter · Action · Zombies

Plants vs. Zombies GOTY Edition
Shared: Tower Defense · Zombies · Strategy

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

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

DG2: Defense Grid 2
Shared: Tower Defense · Strategy · Action

Resident Evil 4 (2005)
Shared: Zombies · Action · Third-Person Shooter

Dead Space™ 2
Shared: Third-Person Shooter · Action · Survival

STAR WARS™ Battlefront™ II
Shared: Third-Person Shooter · Action · Sci-fi

7 Days to Die
Shared: Zombies · Survival · Base Building

The Alters
Shared: Base Building · Survival · Strategy

Resident Evil Requiem
Shared: Zombies · Third-Person Shooter · Action

Resident Evil 6
Shared: Zombies · Third-Person Shooter · Action

Taur
Shared: Tower Defense · Strategy · Action

PRAGMATA
Shared: Third-Person Shooter · Action · Sci-fi

Orcs Must Die! 2
Shared: Tower Defense · Strategy · Action

Infection Free Zone
Shared: Zombies · Base Building · Strategy

Dead Space (2008)
Shared: Action · Third-Person Shooter · Sci-fi

Days Gone
Shared: Zombies · Survival · Action

Aliens: Dark Descent
Shared: Strategy · Action · Real Time Tactics

Thronefall
Shared: Tower Defense · Strategy · Action

Orcs Must Die!
Shared: Tower Defense · Strategy · Action

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