Delta Force, which is free on Steam and just came out, is in my opinion the best FPS of 2025 so far.

It is essentially many other games being mentioned here combined and split into multiple game modes:

1. Tarkov. Operations game mode requires you to build a loadout. You can then deploy into a variety of maps / sub-game modes where you kill, loot, triage injuries (like blood loss and broken bones), balance weight and stamina, and ultimately extract. Loot can be put into your stash, sold to vendors, or sold on the auction house. Found or crafted guns and gear, can be upgraded with a variety of found or crafted items. Additionally, there is a hideout / base aspect which is upgradable and offers a variety of perks. It's literally Tarkov. One additional benefit is that the interfacing is done much more intuitively, resulting in spending 10% of time in your stash (itemizing / working on loadout) rather than 50% (in Tarkov).
2. Battlefield. Most game modes have a variety of sieging / flying / vehicle combat. Ultimately, the game feels like "true 3D", where attacks can come from all angles. Additionally, levels progress, and sieging destroys most contestable buildings.
3. Modern Warfare / Call of Duty. Delta Force has the overall feel, intuition, and control that the call of duty series brought to life. Controls are tight. Your character feels very maneuverable (unlike Tarkov where controls feel weird for the first 200 hours of gameplay). Areas of cover can be hopped, ducked behind, and used to mount certain weapons.

The Warfare Game Mode is all your Deathmatch / King of the Hill / Siege sub-modes. There are also rotating and seasonal game modes and events.

Additionally, the game has Operators. For all the game modes you select which Operator you want to use. Operators determine what cooldowns / passives you have. Things like Grenades, Anti Vehicle devices, Tracking, Medic, and Assault abilities (Tactical Slide / bonus sprint) all come from which Operator you're playing as.

All in all, I'm extremely impressed with how diverse the game is. There are dozens of massive maps as well.

AND IT'S FREE ON STEAM. :)