Untergrund (Cthulhus Ruf special issue - 2015)

(user summery)
This is a special issue of Cthulhus Ruf magazine, featuring the winners of the adventure contest Untergrund (Underground).
All three adventures are set for Cthulhu Now in an underground or otherwise claustropobic location.
1) Charlie's Game:
The crew of an oil rig is taken over by an ancient power. If the riddle is not solved in time, more than an environmental catastrophe will be at hand.
2) Die Schlucht:
Two people lost in a canyon somewhere in the desert. What happenend? Who will survive among heat, blood and shards?
3) Surok B-11
The bowels of earth have their own laws more often than not. But what a team of experts will find in a shut down russian mine will blow their minds.