Games like Front Lines
Games like Front Lines include SMITE®, Totally Accurate Battle Simulator, Aimlabs, Once Human, and Wobbly Life. We matched them by the tags players give Front Lines on Steam (Free to Play, Strategy, Action, Simulation, and Casual): closest matches first, and among equally close ones the better-known games.

SMITE®
Shared: Free to Play · Action · Strategy

Totally Accurate Battle Simulator
Shared: Simulation · Strategy · Sandbox

Aimlabs
Shared: Free to Play · Simulation · Action

Once Human
Shared: Free to Play · Action · Strategy

Wobbly Life
Shared: Adventure · Simulation · Action

War Thunder
Shared: Free to Play · Action · Simulation

Idle Champions of the Forgotten Realms
Shared: Free to Play · Strategy · Adventure

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

Where Winds Meet
Shared: Free to Play · Adventure · Strategy

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

SuchArt: Creative Space
Shared: Free to Play · Simulation · Sandbox

The Scroll of Taiwu : Beyond The Dome
Shared: Strategy · Sandbox · Indie

Marvel Rivals
Shared: Free to Play · Action · Strategy

Total Tank Simulator
Shared: Strategy · Action · Simulation

Game Dev Tycoon
Shared: Strategy · Simulation · Indie

House Flipper
Shared: Simulation · Casual · Sandbox

Ultimate Epic Battle Simulator
Shared: Simulation · Strategy · Action

Plague Inc: Evolved
Shared: Strategy · Simulation · Indie

Plebby Quest: The Crusades
Shared: Strategy · Casual · Simulation

EmergeNYC
Shared: Simulation · Action · Strategy

Feed and Grow: Fish
Shared: Simulation · Action · Early Access

Achievement Clicker
Shared: Casual · Strategy · Simulation

The Sims™ 4
Shared: Free to Play · Simulation · Casual

Drug Dealer Simulator: Free Sample
Shared: Free to Play · Action · Simulation