Games like Holdfast: Frontlines WW1 - American Forces
Games like Holdfast: Frontlines WW1 - American Forces include Hell Let Loose: Vietnam, Total Tank Simulator, Totally Accurate Battle Simulator, Plague Inc: Evolved, and SMITE®. We matched them by the tags players give Holdfast: Frontlines WW1 - American Forces on Steam (Simulation, Strategy, Action, Massively Multiplayer, and Indie): closest matches first, and among equally close ones the better-known games.

Hell Let Loose: Vietnam
Shared: Simulation · Action · Strategy

Total Tank Simulator
Shared: Simulation · Strategy · Action

Totally Accurate Battle Simulator
Shared: Simulation · Strategy · Indie

Plague Inc: Evolved
Shared: Simulation · Strategy · Indie

SMITE®
Shared: Action · Strategy · Simulation

BidKing
Shared: Strategy · Simulation · Massively Multiplayer

Mount & Blade II: Bannerlord
Shared: Strategy · Action · Simulation

Door Kickers
Shared: Strategy · Simulation · Action

House Flipper
Shared: Simulation · Strategy · Action

Shieldwall
Shared: Simulation · Action · Strategy

The Escapists
Shared: Strategy · Simulation · Action

Squad 44
Shared: Simulation · Massively Multiplayer · Action

War Thunder
Shared: Simulation · Action · Massively Multiplayer

Ultimate Epic Battle Simulator
Shared: Simulation · Strategy · Action

We Who Are About To Die
Shared: Action · Strategy · Simulation

Your Only Move Is HUSTLE
Shared: Action · Strategy · Simulation

Drug Dealer Simulator
Shared: Simulation · Action · Indie

Game Dev Tycoon
Shared: Simulation · Strategy · Indie

Police Stories
Shared: Strategy · Action · Simulation

OMON Simulator
Shared: Simulation · Action · Indie

Ultimate Epic Battle Simulator 2
Shared: Simulation · Strategy · Action

KovaaK's
Shared: Simulation · Action · Indie

Men of War: Assault Squad 2
Shared: Strategy · Simulation · Action

Notes of Soul
Shared: Massively Multiplayer · Action · Indie