Yes its similar to The Division, but your not actually going out to do missions where you get a reward for killing this person or that general etc.
There is a free roam mode, 1v1 mode, as well as raids and I think a few others.
The game will have a karma system for team kills... If you build up enough karma.. a bounty will be placed on your head and everyone will be after you to kill you, and once you die you loose all the gear you had on you.
When you die, you lose everything on you except whats in the gamma container and what you have in your stash. Anything else (on your body) you lose and no way to get it back. Makes you think twice about run and gun style gameplay.
You can get shot while searching dead bodies. You will have to make sure the area is clear before taking the time to search bodies, crates, etc. I like it because it keeps you on your feet and always feeling slight paranoia.
Hopefully this answers some of your questions you may have. Here is a link to their offical FAQ page with about 180 questions and answers.
https://www.escapefromtarkov.com/faq