Hands down my favorite and (very) security oriented game is https://overthewire.org/wargames/bandit/ https://overthewire.org/wargames/bandit/ --- It's actually

Hands down my favorite and (very) security oriented game is https://overthewire.org/wargames/bandit/ https://overthewire.org/wargames/bandit/ --- It's actually a series of games but this is the first one. I learned so much playing these.