I'm trying to collect the all of the achievements. I just need to know what to do to get the secret achievements.
1 Answer
If you are playing on Steam (I am not sure about the mobile version but they should be there too)
- All 3 Medals (Easy, Medium, and Hard) on Ice Flow.
- All 3 Medals (Easy, Medium, and Hard) on Challenger Deep.
- All 3 Medals (Easy, Medium, and Hard) on Ice Flow Co-Op.
- All 3 Medals (Easy, Medium, and Hard) on Challenger Deep Co-Op.