No revenue estimate for PSN — its rating/review counts don't calibrate to sales the way Steam's do. Reviews and prices only.

Ice Station Z

After a strange virus spreads across an Arctic Island you are left alone to survive. Scavenge for food, drink, medical supplies, weapons, ammunition, clothes, fuel and other useful equipment. Find shelters, vehicles and other interesting locations to help you survive during day and night. Go scavenging, fishing and hunting with friends or alone, it's up to you how you survive.