A: This website provides various challenges that require computer hacking skills to solve. To solve a challenge, you'll have to find the answer (also known as the flag) of it. If you solve a challenge and submit the flag you can get the corresponding points. There is also a rank page showing top players with highest points.
If you become the first one to solve a challenge that hasn't been solved yet, you become a breakthrough player of it and your username will be shown in the challenge page.