UQCyberSquad's Week 2 Intro CTF
This CTF is catered towards beginners; a majority of the challenges shouldn't require anything more than a browser and critical thinking skills!
In my opinion, the hardest challenge is eyes_closed, and the most fun one is xtra256.
Once you've completed this CTF, feel free to move on to The Official UQCyberSquad CTF Gym for more of a challenge.