Heavily scripted shooters that take place in glorified corridors are well and good for most, but some people like to kill things out in the open, and kill them with a single bullet. For them, there is ArmA series, and for them, a third game in the franchise is on its way.
https://lastchance.cc/this-military-simulator-is-a-match-made-in-heavy-metal-5797834%3C/a%3E%3C/p%3E
In addition to a singleplayer campaign, there’s the expected multiplayer modes (with both “cooperative & competitive scenarios”) and mod tools. You can also create dedicated servers on both PC and Linux.
It’ll be out next year.
