"The Cipher Game" is a cross-platform educational project prepared as a FPP (first person perspective) game, consisting of four missions. It describes the course of the Polish-Bolshevik war and the influence of Polish cryptology on its victorious end. The project was created with the widest possible digital distribution in mind. Apart from the version for PC and VR goggles, a port of the game for Android and iOS mobile devices was also created. In the mobile version, the mechanics, control and graphic settings were adjusted to the capabilities of smartphones. Each version of the game offers a slightly different type of experience, from the most immersive VR to the simplified but widely accessible mobile version.