| Name | Points | Tags | Writeups | |
|---|---|---|---|---|
| John the Dropper | 100 | misc network | 1 | |
| Am I Cheating? | 200 | reverse engineering | 1 | |
| Hard Interview | 50 | grabbag misc | 2 | |
| John The Referee | 150 | web | 3 | |
| And the prophet said... | 100 | crypto | 1 | |
| Exceptionally obfuscated | 400 | reverse engineering | 1 | |
| Lightning | 500 | misc electronics | 1 | |
| Even the Server Lies | 250 | crypto | 1 | |
| Gandgalf | 450 | riddle reverse engineering crypto forensics | 1 | |
| johns-library | 150 | pwnable | 1 | |
| john-in-the-middle | 100 | forensics | 4 | |
| John The Traveller | 100 | web | 5 | |
| It's Hungry | 100 | midi forensics chiptune | 4 | |
| John Pastry Shop | 100 | java pwnable | 4 | |
| 3DOGES2 | 400 | crypto | 2 | |
| Hard Interview | 50 | misc grabbag swordfish | 4 | |
| Hanoi As A Service | 50 | pwnable prolog | 8 | |
| Exorcise | 50 | crypto | 4 | |
| Magic Chall | 350 | web | 1 | |
| Magic Chall | 350 | web | 4 | |
| reversemeplz | 200 | reverse engineering | 5 | |
| John the Packer | 350 | reverse engineering packing | 3 | |
| Crack Me If You Can | 100 | android reverse engineering | 5 | |
