Terraria is a sandbox game similar to minecraft. Its main difference is that it’s a 2D game with many more things to do and it’s also a lot more challenging. You can play with friends or go solo. Most of what you will be doing is mining and exploring caves for valuable ores and materials to craft and make equipment to face the many bosses the game has. All the bosses have there own special thing like the eye of Cthulhu is likely the first boss you will face and it’s a simple fight where it just chases you but in expert mode it gains a new move where around the middle of the fight it will go in its rage mode, in which it moves a lot faster. 

The game gets a lot easier once a few hours in when your all set up you can make houses and npcs (non player character) will move in they all have there own special things the merchet will sell items the demolitioner sell dynamite very useful for joining the nurse will heal you for a price ect. 

Once you set for the final boss of the first half you mine all the way to the underworld then summon the wall of flesh a horrifying wall of meat that goes from the right or left side of the world all the way to the other side once killed it makes the game so much harder and fun. All enemies are way stronger and tons of new ones spawn basically like you start all over that’s how hard it gets. If you have a couple friends with lots of time to play I highly recommend it. If you like minecraft but it’s too hard for you i don’t recommend terraria because it is a hard game to beat.