PicoCTF
A beginner-friendly CTF (Capture The Flag) platform where you can learn and practice cybersecurity challenges.
OverTheWire Wargames
Offers a collection of CTF-style games designed to help you build and sharpen your hacking and problem-solving skills.
OverTheWire Bandit
A beginner-level CTF that guides you through basic Linux commands and fundamental hacking techniques.