Gameplay Terraria is played both alone and in co-op with friends, and a huge Russian-language wiki will help you with this, in which more than two thousand pages have already been written. You can buy it on Steam, or you can just download it for free and enjoy. Terraria was developed by the Re-Logic studio in 2011, and this is the best thing they have done in their entire existence. This pixelated 2D sandbox with platforming elements steals the souls of users, not otherwise.