Escape from Tarkovis the most realistic shooting game, I don‘t think you can compare this to any other game. Basically you chose your loadout out of your stash (things you got from previous raids, like the overall inventory) and a map and get into a raid. There you got 15-60 minutes time and you will spawn with 4-9 other players + plus „scavs“ ( mostly npc controlled) . Your aim now is to get loot and fulfil quests you got from traders and at the end, extract all of your loot without getting killed. If you get killed you lose everything you got with you, if you are able to extract, you can add your raid inventory to your stash. Now you restart the whole process

. I think this sounds borring, doing the same **** over and over again, but it really makes fun to me, especially with Friends. But be aware of the hardcoreness of this game and watch some YouTube videos or reviews before you buy it, it‘s not for everyone.
There are some playstyles. You can be the quest guy, those are mostly map scouting, or the trader on the Community market, or just Making enough money and doin some quests and just have your fun in raids without a big target
Watch YouTube video gameplay for better understanding