- Basic Android RE 1 (easy)
- Reykjavik (easy)
- Riyadh (easy)
- Rangoon (easy)
- Ramada (easy)
- Raspberry (easy)
- Recklinghausen (easy)
- Riga (easy)
- Finish the Flag (easy)
- Rzeszow (easy)
- PyDis (medium)
- CTF 6502 (medium)
- Rotterdam Reversing Challenge (medium)
- Rio32 (medium)
- RE_verseDIS (medium)
- Time to Eat (medium)
- Reverse Me (medium)
- Roma (medium)
- arm arch (medium)
- Rabat Reversing Challenge (medium)
- Patcher (medium)
- PIN (medium)
- Bite-code (medium)
- Jumper (medium)
- Regina (medium)
- Dune (medium)
- Old times (medium)
- Not so fast (medium)
- file manager (medium)
- Every Bit Counts (hard)
- Lost In The Binary (hard)
- Sonnet (hard)
- APK Login Cracking (hard)
- Rainbow (hard)
- Introduction to Intrinsics (hard)
- quack3 (hard)
- PACMAN (hard)
- The Super Secure Service (hard)
- Forbidden executable (hard)
- Rouen (hard)
- Number Cruncher (hard)