Games like Metal War
Games like Metal War include Escape From Duckov, PUBG: BATTLEGROUNDS, ARK: Survival Ascended, 7 Days to Die, and Once Human. We matched them by the tags players give Metal War on Steam (Survival, Base Building, Tower Defense, Action, and Top-Down Shooter): closest matches first, and among equally close ones the better-known games.

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

PUBG: BATTLEGROUNDS
Shared: Survival · Action · Shooter

ARK: Survival Ascended
Shared: Survival · Base Building · Action

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

Once Human
Shared: Survival · Action · Base Building

They Are Billions
Shared: Base Building · Survival · Strategy

The Riftbreaker
Shared: Base Building · Survival · Tower Defense

ARK: Survival Evolved
Shared: Survival · Base Building · Action

Until We Die
Shared: Survival · Base Building · Strategy

Thronefall
Shared: Tower Defense · Strategy · Action

Cluckmech Oasis
Shared: Tower Defense · Strategy · Top-Down Shooter

Rust
Shared: Survival · Adventure · Action

Enshrouded
Shared: Survival · Base Building · Adventure

Kingdom: New Lands
Shared: Base Building · Survival · Tower Defense

Sons Of The Forest
Shared: Survival · Base Building · Adventure

The Front
Shared: Survival · Base Building · Tower Defense

Raft
Shared: Survival · Base Building · Adventure

Kingdom Two Crowns
Shared: Tower Defense · Base Building · Strategy

Kenshi
Shared: Survival · Base Building · Action

Oxygen Not Included
Shared: Base Building · Survival · Strategy

V Rising
Shared: Survival · Base Building · Character Customization

Green Hell
Shared: Survival · Base Building · Action

RimWorld
Shared: Base Building · Survival · Strategy

This War of Mine
Shared: Survival · Base Building · Strategy