You can see all puzzles from the past here https://community.rapyd.net/c/hack-the-galaxy/challenges-archived/42
Is there any way to check your answer on expired puzzles?
No, there isn’t. Maybe you can know the answers to puzzles prior to Meta 1 Puzzle by asking someone through message, but not for puzzles that came after Meta 1.
Ok, thanks for the reply. Just stumbled upon this recently so working back through some of the previous puzzles and was hoping there was an answer sheet somewhere or something.