A collaboration event between Nyanko Daisensou and the line strategy RPG game known as Merc Storia (メルクストーリア, Meruku Sutōria, Merc Storia) was held originally held from June 17th, 2014 to June 30th, 2014. The collaboration includes an exclusive Gacha, stages, Catnip Challenges and stamps going on during the collaboration period. The game is published by Happy Elements K.K.

- The Battle Cats Miraheze Wiki