The crossover event will mark the first time that Goblin Slayer characters will appear in a smartphone game.
Crunchyroll announced on Thursday that Crunchyroll Games is now co-publishing the Grand Summoners game in partnership with Good Smile Company and NextNinja.
The game will run a crossover event with the Goblin Slayer anime from June 6 to July 31.
Grand Summoners launched for iOS and Android devices in Japan in November 2016.