TKKG - Die Feuerprobe is a full version adventure game for Android devices developed by USM. The game is based on a new and exciting case that has not been featured in any of the books or audio dramas before. In this game, players help Tim, Karl, Klößchen, and Gaby investigate the safety concerns at their school.

The game offers a detective-adventure experience with a mix of new and familiar characters. Players will explore different locations, including the school, the Sauerlich Villa, the police headquarters, the old waterworks, the new exit-room, and the towers of the old city wall. The game is suitable for players aged ten and above.

TKKG - Die Feuerprobe features the original voice actors from the audio dramas, adding an extra layer of authenticity to the game. The game is engaging and challenging, and players will need to act as detectives and gather information to solve the case.