# Challenges
Capture the flags. Prove your skills.
108 challenges found
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Bear Ninja Cowboy
A rock-paper-scissors variant where Bears, Ninjas, and Cowboys battle it out. Win 30 rounds in a row to claim the flag.
Basics 6
Another gallery with server-side image loading. Look beyond what the page shows you.
Basics 5
A number guessing game with client-side validation. But does the server agree with the rules?
Basics 4
The server remembers who you are between requests. But who decides what it remembers?
Basics 3
A gallery page displays images from the server. Is what you see really all there is?
Basics 2
The server only trusts a specific type of visitor. Can you convince it you belong?
Basics 1
A simple login page guards a secret. Sometimes the answer is hiding in plain sight.
Baby PHP
A PHP application that expects structured data in a very specific format. Can you speak its language?