Helium

Distant future. A group of outer space explorers discovered a strange signal coming from planet Gliese 86b. After entering the orbit the sensors have spotted the signal source - it was an artifact of an unknown nature and origin. The captain decided to land and examine their finding. When trying to land the system malfunctioned, equipment failure resulted in crash landing... You are a liaison on Vega 237 spacecraft. All crew members died and you are all by yourself in the midst of an unknown planet. Your goal is to find out what happened to the crew and establish the signal's nature.