Calculation Castle – Greco’s Ghostly Challenge Multiplication, also known as Greco Kara no Chousenjou! Keisan no Shiro to Obake-Tachi – Kakezan in Japan is an Edutainment game developed and published by Media5 for the Nintendo 3DS. It was released exclusively in Japan on August 21, 2013. The name’s Greco. I’m sending you an invite to face the challenges that await in my castle! So, let’s play a game!! I live at the very top of my castle! Do you got what it takes to reach me? It won’t be easy. In order to get to me, you gotta pass through several rooms. In these rooms, you’ll have to solve multiplication problems to pass.
That’s why my castle is called the Calculation Castle! Moreover, my castle is full of ghosts with many tricks standing in your way, so good luck and do your best! If you manage to beat my ghostly henchmen and get through the rooms, you’ll receive lots of hidden rewards…but can you do it? I guess I’ll wait and see! Heh heh heh…” The game is composed of a series of stages and there are ghosts and locked doors within each stage. Greco and his ghosts will present the player with problems that they will need to solve in order to defeat the ghosts, unlock the doors, and proceed to the next stage.
If you find a ROM that's encrypted, you need to use the Batch CIA 3DS Decryptor, created by Matif.
Not all games are fully compatible with Citra. If you do find a game that's not working, try using the latest PabloMK7 Citra fork, the continuation of Citra since its shutdown.
