This is a 2D platform game that have a very similar gameplay of Minecraft, but it have more stuff and more playability than the later. I've played this more than any other games so far. It's very interesting and have much more to explore. It have dozens of minions and bosses, many biomes that contains different unique resources and so on...

~ Open World: Have pretty much the same biomes like Minecraft, but it's more enjoyable to collect many resources that are special in certain places. Treasure chest and weapons including explore the abandoned buildings made the exploration more entertaining.
~ Weapons & Tools: There're many interesting weapons and tools you won't expected in Minecraft, like magic wands that can cast spells each of them have a unique effect, or weapons that can summon little minions to fight for you. So it leads you to choose your own profession to
whether be a warrior or to be a mage or to be a sommoner.
~ Crafting: Terraria have a very similar crafting system like Minecraft. But there are much more recipes that you can make such as a bait to summon a boss or accessories and gadgets to make you more powerful, the process of searching for the materials is really enjoyable.
~ Bosses & Minions: Have varies of monsters that only appear in a certain biome or have it's own speciality. Some material for crafting an object can only be obtained by some minions or bosses, they would also drop special items if you're lucky, so it would be fun for players to fight and kill monsters with a purpose not just solely for boredom.
~ NPCs: This game have actually NPCs and some of them are even interactive. You'll unlock or find NPCs as you achieved something in the game and they will eventually move in to your house. Some of the NPCs are sellers that you can buy materials if you need. And you can also customized your hair color if you have dyes. Or maybe you can buy decorative clothes from the tailors.

Pros:
+Open world game. (Not quite large as Minecraft but it's still very large.)
+Many biomes (jungle, hell, forest, corrupt, crimson, ocean, desert, dungeon, bee hives and many other biomes.)
+Various of monsters and bosses (zombies, eye balls, slimes, skeletons, etc.)
+you'll meet many NPC as you play the game and provide shelters for them.
+many events like pumpkin moon, solar eclipse, slime rain, goblin army..

Cons:
-background music is a bit tedious.
-graphics are...not...so...
-game is so addicting that I forgot about my school work.
-there're just too many Pros that I can't add them all to the list.

Terraria is unique from any other sandbox games such as Minecraft, the specialty of this game are just too much that the rest of them you'll need to experience them on your own. It's definitely gonna worth your for a while.

9.5/10