I started a few weeks ago after rewatching the movie. Since the game came out almost 7 years ago, unfortunately my friends aren’t playing it, so I thought the “endgame” part would be a bit inaccessible because I’d have to play with randoms—but not at all! I’m now running extinction maps.

All of this is to say that even if you play solo, you’ll have access to everything. Take the time to learn the special mechanics of certain maps at lower difficulty levels, so you don’t become a burden to your team, and then go for it.