A new cross-promotion initiative between two successful mobile game developers, Supercell from Finland and GungHo Entertainment from Japan has gone live in an effort to support each other’s main games. The promotion will run for two weeks, and will feature GungHo’s wildly popular Puzzle & Dragons and Supercell’s Clash of Clans and Hay Day.

During the promotion, Puzzle & Dragons will feature a special Clash of Clans-themed dungeon where players will fight and capture monsters inspired by the game. Clash of Clans, on the other hand, will feature a Puzzle & Dragons promotion in the in-game inbox and the Battle Log section of the game. Hay Day will also feature a Puzzle & Dragons trailer in the multimedia section of its in-game newspaper.

Cross promotion has become an important tool for developers. By using cross-promotion, two companies who may have very different games can work together to mutually bring more users into each other’s products. With the rise of services like Chartboost, cross-promotion is easier than ever. If this promotion is successful, more developers may be following these two companies’ example.