To get you started, we built a VM that you can simply import in 
Virtual Box with a bunch of useful tools.
                You can dowload this OVA 
here.
                
                Here are the tools installed on the VM:
                - 
exiftool
                - 
burp
                - 
cutter
                - 
binwalk
                - 
r2
                - 
gdb/gef
                - qemu-user
                
                If you want to solve the challenges on your own machine, we recommend you to use a Linux operating system.
                Most of the reverse challenges are ELF binaries and won't run on Mac OS or Windows.
                Additionnaly, you will need the following languages interpreters:
                - python3
                - lua