The Last of Us

Play the game first then watch this 

How similar is it to the game: 50%. The main story beats are there but the side characters that is not in the game has more time to shine 

Did they change anything? Yeap. A couple of scene from the game were not here. Probably because it won't fit the tv format

Clickers: Not that much but the story isn't about them anyway

Season 2: Not until 2025.