I'm usually too lazy to write anything on my site, especially since no one reads it (hi there). On the other hand, if I write for myself, I can write anything.
Any online shooter can be called tactical if you want, especially if it has the ability to lean sideways. But in my opinion there are (or rather were) only three games that deserve such a title. They are SWAT 4, early PUBG and RoE from the winter map days.
A tactical shooter is a shooter where stealth is more important than sleight of hand. In most online shooters, there is a way to outsmart your opponent, but it usually gives you a minimal advantage. For example, in Hunt Showdown, the advantage of surprise ends after the first bullet. And if you couldn't kill the enemy at once (which is pretty hard to do if he's constantly on the move and spamming ADADADAD), the chances of winning a firefight rather depend on your ability to shoot accurately.
Those three shooters I listed above are pretty different from most. Unfortunately, all of them are dead at this point. I won't write much about SWAT 4 here, it's worthy of a separate article. RoE was just a simplified clone of PUBG. But there is something to say about early PUBG.
Early PUBG was great. Probably the best game I've seen in my life (so far). Unfortunately, as time went on, PUBG turned into Call of Duty. The old PUBG was a survival game. Modern PUBG is a game about domination.
In early PUBG, you could predict other people's actions pretty accurately. And both on a tactical scale (when I directly follow a player and can guess what he will do next) and on a strategic scale (when I look at the map and can mentally lay out the routes people will take). The ability to predict the enemy's actions gives you the ability to start a fight in a more favorable situation. This is what made PUBG a tactical shooter.
In the old PUBG, everyone ran on foot, and the map was full of natural obstacles. In addition to mountains and rivers, wastelands were also dangerous because there was nowhere for the player to hide. This allowed you to ambush in advance in the place where a person was likely to run through.
In the new PUBG, there's a car every 100 meters, and every third house has a bicycle (which you can put in your pocket). A huge layer of gameplay associated with long journeys across the map is simply gone.
I know most people will disagree with this, but I think even the addition of the parkour system made the game worse. If a player runs into a building with one exit, they can be caught doing that. But if the game has the ability to jump out of windows, it basically means that every window is an exit, which means you can't predict anything.
Early PUBG was great for its ability to generate something like stories. I would quite often go and remember some interesting situations for days afterward. Some of those memories are still in my mind to this day. That being said, I have hundreds of hours played in CS:GO, but I don't remember anything other than the fact that I was often standing on B with aug behind crates and camping the entrance.