What are some cool tactical shooters? I know that Linux has some good shooters like Xonotic, but I would like something more tactical like Arma, Rainbow Six Siege or CS:GO. It doesnt have to be open source altho this is a big plus. I know about AssaultCube and Urban Terror, but they seem unmaintained/dead.
America’s army still has a decent amount of people playing. Mostly older folks, but there are tons of community made maps. Give it a try.