Alone on Mars

Alone on Mars is a 2D survival shooter on Mars. An SOS signal was sent from Mars, which was captured by your spacecraft. You decide to change your course and travel to the planet to figure out what happened. Upon arrival, you notice that each space station is home to incomprehensible creatures that appear to have attacked the expeditionary groups and they were forced to send this signal. Did any of them survive? Are there any traces their presence? What does the expeditionary program to visit Ma...