Games like World War Legion

"Battalion Legacy is a Warfare Shooter game that offers both single-player and multiplayer modes, with a focus on 5v5 infantry combat for a competitive experience. The game boasts good mechanics, pretty visuals, and integration with FACEIT for skill-based competitive matchmaking, tournaments, and rankings. However, it is also known for being very grinding, having some bugs, and offering 1v1 Showdown mode."

"World War 3" is a multiplayer tactical first-person shooter set in a modern global conflict. Engage in thrilling skirmishes across real-world locations, utilizing a wide range of weapons, vehicles, drones, and tactical strikes. Fight through stunningly detailed maps, with every shot and decision potentially crucial to your team's victory. Customize your loadout and collaborate with your team to outgun and outflank your enemies.

Splitgate 2 is the only free-to-play shooter with portals, delivering next-level gunplay, fluid movement, and a constantly evolving experience, featuring a new Battle Royale where you can portal between unique worlds. Welcome to the future of sport. Fluid Movement: Outsmart and outmaneuver with the power of portals. Chain your portals, dodge danger, and pull off plays impossible in any other game…

Powerful nations are dispatching mercenaries to secure Q-On at contaminated sites, off limits to most men. Swarming around the sites like a flock of crows, they begin their own battles.

Join fast-paced action-packed combat. Play Combat Master -- the ultimate FPS experience on your PC and Mac. Best-in-class multiplayer gunfight. Next-level performance. And a whole lot more. Combat Master is designed for extreme performance on low-end hardware, so please don't judge graphics that hard ')) Whether you're a tactical professional, or simply love the tactical aesthetic, Combat Mas…

"Halo Infinite's campaign allows you to step into the Master Chief's armor for an epic open-world adventure on the Halo ring, with network co-op and mission replay. The free-to-play multiplayer features over 70 matchmaking maps, extensive customization options, and access to community-made Forge content. Explore, fight, and strategize in this expansive sci-fi shooter experience"

Quake Champions is a fast-paced arena shooter that blends classic Quake combat with unique champions, each boasting distinct abilities and attributes. Players engage in intense, skill-based matches using an arsenal of iconic weapons like the Rocket Launcher and Railgun. The game offers dynamic gameplay that rewards mastery and quick reflexes.

The Vault Edition of Call of Duty: Modern Warfare III offers additional content including operator skins, weapon vaults, and a battle pass with tier skips. The game continues the story from Modern Warfare II, where Captain Price and Task Force 141 face off against the dangerous war criminal Vladimir Makarov, who is expanding his power globally. This edition also includes the Soap Operator Pack and Zombie Ghost Operator Skin for use in Modern Warfare III, Modern Warfare II, and Warzone. Adapt and survive in this intense fight against the ultimate threat.

Operation: Harsh Doorstop is a free, community developed, tactical shooter. Developed by the studio Drakeling Labs in partnership with MicroProse Software, Inc. Built using the OHDCore framework for Unreal Engine 4.

"Days of War is a fast-paced, competitive first-person shooter set in World War 2 with non-stop combat in 32-player multiplayer matches or offline against bots. Experience intense battles across 12 maps, including European, African, and Eastern front theaters. Customize your gameplay with the map editor and Steam Workshop support for creating and sharing custom maps."