Misc challenges
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
11,488 in the index. The 200 below are ranked by how many independent published solutions exist - which is the right order for learning, not for difficulty. A challenge with nine writeups gives you nine explanations of the same technique to compare; a harder one nobody documented gives you none.
- TutorialCSAW CTF Qualification Round 201622 writeups
- slitheryCSAW CTF Qualification Round 202021 writeups
- SC1: Math botAlexCTF 201720 writeups
- Bad AppleDCTF 202118 writeups
- FilestoreGoogle Capture The Flag 202118 writeups
- uglybashredpwnCTF 202018 writeups
- System dROPCyber Apocalypse 202117 writeups
- rot-iDownUnderCTF 202017 writeups
- ShifterångstromCTF 202017 writeups
- ELF CrumbleDEF CON CTF Qualifier 201817 writeups
- Sekai Meme LauncherSekaiCTF 202516 writeups
- TimedTJCTF 202016 writeups
- Fare EvasionUIUCTF 202415 writeups
- Let’s Play Osu!ManiaSekaiCTF 202215 writeups
- TreeboxGoogle Capture The Flag 202215 writeups
- message-boardHSCTF 8 202115 writeups
- RevisionRITSEC CTF 202115 writeups
- CaaSINOredpwnCTF 202015 writeups
- static-static-hostingredpwnCTF 202015 writeups
- SQLTAMUctf 19 201915 writeups
- Alien CampCyber Apocalypse 202114 writeups
- AuthenticatorCyber Apocalypse 202114 writeups
- Strong passwordDCTF 202114 writeups
- writeonlyGoogle Capture The Flag 202014 writeups
- Work ComputerGoogle Capture The Flag 2019 (Quals)14 writeups
- RegexpireCSAW CTF Qualification Round 201614 writeups
- Alter EgoSekaiCTF 202513 writeups
- Out of the BucketUofTCTF 202413 writeups
- Mine The GapGoogle Capture The Flag 202313 writeups
- vmwhere1UIUCTF 202313 writeups
- write-flag-where2Google Capture The Flag 202313 writeups
- odd shellUIUCTF 202213 writeups
- DragonDCTF 202113 writeups
- not really mathHSCTF 8 202113 writeups
- Save the EnvironmentCyber Apocalypse 202113 writeups
- Eternal GameTAMUctf 202013 writeups
- formattingDownUnderCTF 202013 writeups
- inspector-generalredpwnCTF 202013 writeups
- Secret ArrayFwordCTF 202013 writeups
- ws2ångstromCTF 202013 writeups
- Zipped UpTJCTF 202013 writeups
- babycryptowebFireShell CTF 201913 writeups
- I heard you like files.TAMUctf 19 201913 writeups
- Sticky FingersGreHack CTF 201913 writeups
- pysandboxTokyoWesterns CTF 4th 201813 writeups
- mfwCSAW CTF Qualification Round 201613 writeups
- Misc 50 - The Hidden MessageInternetwache CTF 201613 writeups
- HeartbleedPlaidCTF 201413 writeups
- All About RobotsNahamCon CTF 202412 writeups
- Crack MeSekaiCTF 202412 writeups
- EnableMeUofTCTF 202412 writeups
- KittyKnightCTF 202412 writeups
- TimeKORPCyber Apocalypse 2024: Hacker Royale12 writeups
- SymatrixGoogle Capture The Flag 202312 writeups
- Alien MathCSAW CTF Qualification Round 202112 writeups
- Don't let it runDCTF 202112 writeups
- Encrypted the flag I haveDCTF 202112 writeups
- YeetCodecorCTF 202112 writeups
- AdditionDownUnderCTF 202012 writeups
- Biggest LowestX-MAS CTF 202012 writeups
- BlindTAMUctf 202012 writeups
- Fake FileNahamCon CTF 202012 writeups
- In a pickleDownUnderCTF 202012 writeups
- Miyazaki TriviaAUCTF 202012 writeups
- On the spectrumDownUnderCTF 202012 writeups
- Slowest DecryptionTSG CTF 202012 writeups
- Splooshpbctf 202012 writeups
- BabyEchoUTCTF 201912 writeups
- Entry ExamSunshineCTF 201912 writeups
- LithpångstromCTF 201912 writeups
- TimeWarpSunshineCTF 201912 writeups
- EnumTAMUctf 18 201812 writeups
- Obat Penggugur Kandungan Yang Aman Wa : 0822 4236 1182noxCTF 201812 writeups
- zipperPlaidCTF 201712 writeups
- Code 60 - It's Prime Time!Internetwache CTF 201612 writeups
- KillCSAW CTF Qualification Round 201612 writeups
- catwesternDEF CON CTF Qualifier 201512 writeups
- Stray CatSekaiCTF 202511 writeups
- leaving soonjustCTF 2024 teaser11 writeups
- SafeBridgeReal World CTF 6th 202411 writeups
- At HomeUIUCTF 202311 writeups
- ChainmailUIUCTF 202311 writeups
- RestrictedCyber Apocalypse 2023: The Cursed Mission11 writeups
- ArchaicångstromCTF 202111 writeups
- BlobRITSEC CTF 202111 writeups
- doot dootUIUCTF 202111 writeups
- emoteUIUCTF 202111 writeups
- Extraterrestrial CommunicationDCTF 202111 writeups
- Julius’ ancient scriptDCTF 202111 writeups
- Leak SpinDCTF 202111 writeups
- NRCHSCTF 8 202111 writeups
- avrGoogle Capture The Flag 202011 writeups
- basicsGoogle Capture The Flag 202011 writeups
- Cracker BarrelAUCTF 202011 writeups
- LeggosDownUnderCTF 202011 writeups
- Oreocsictf 202011 writeups
- QR Generator2020 Defenit CTF11 writeups
- 20000Codegate CTF 2019 Preliminary11 writeups
- Enter Space-Time CoordinatesGoogle Capture The Flag 2019 (Quals)11 writeups
- flagromGoogle Capture The Flag 2019 (Quals)11 writeups
- Hello WorldTAMUctf 19 201911 writeups
- heXDumpHITCON CTF 2019 Quals11 writeups
- Home ComputerGoogle Capture The Flag 2019 (Quals)11 writeups
- WordpressTAMUctf 19 201911 writeups
- Misc 70 - Rock With The Wired SharkInternetwache CTF 201611 writeups
- rollthediceHackover CTF 201611 writeups
- Secret HolderHITCON CTF 2016 Quals11 writeups
- WarmupCSAW CTF Qualification Round 201611 writeups
- babyechoDEF CON CTF Qualifier 201511 writeups
- GuessTheNumberHack.lu CTF 201511 writeups
- ezhpPlaidCTF 201411 writeups
- Ticket MasterSekaiCTF 202510 writeups
- aplet321LA CTF 202410 writeups
- colorBuckeyeCTF 202410 writeups
- iDoorNahamCon CTF 202410 writeups
- Secret Message 1UofTCTF 202410 writeups
- TwineNahamCon CTF 202410 writeups
- xnorBuckeyeCTF 202410 writeups
- HijackCyber Apocalypse 2023: The Cursed Mission10 writeups
- PersistenceCyber Apocalypse 2023: The Cursed Mission10 writeups
- Small StEpsCyber Apocalypse 2023: The Cursed Mission10 writeups
- ZERMATTGoogle Capture The Flag 202310 writeups
- Float onångstromCTF 202110 writeups
- Hidden messageDCTF 202110 writeups
- Russian DollHeroCTF v3 202110 writeups
- The CountDEADFACE CTF 202110 writeups
- Beginner's MiscTSG CTF 202010 writeups
- clam clam clamångstromCTF 202010 writeups
- doranullcon HackIM 202010 writeups
- file-system-based strcmp go brrrrPlaidCTF 202010 writeups
- golf.soPlaidCTF 202010 writeups
- Lorem IpsumCyberYoddha CTF 202010 writeups
- MENTALMATHTAMUctf 202010 writeups
- PI 1: Magic in the AirrgbCTF 202010 writeups
- Rivest Shamir Adlemancsictf 202010 writeups
- RSAPWNTAMUctf 202010 writeups
- Satan's JigsawHouseplant CTF 202010 writeups
- SoraAUCTF 202010 writeups
- Too Many Credits 1TAMUctf 202010 writeups
- Too Many Credits 2TAMUctf 202010 writeups
- ws1ångstromCTF 202010 writeups
- Zip-a-Dee-Doo-Dah Houseplant CTF 202010 writeups
- Drive to the targetGoogle Capture The Flag 2019 (Quals)10 writeups
- mini converterCodegate CTF 2019 Preliminary10 writeups
- Sight at LastTJCTF 201910 writeups
- suckmore-shellWPICTF 201910 writeups
- freenote20180CTF/TCTF 2018 Finals10 writeups
- NeighbourASIS CTF Quals 201810 writeups
- Run me!SECCON 2017 Online CTF10 writeups
- Clams Don't DanceCSAW CTF Qualification Round 201610 writeups
- Code 50 - A numbers gameInternetwache CTF 201610 writeups
- Misc 60 - Quick RunInternetwache CTF 201610 writeups
- RobotsInsomni'hack 201610 writeups
- RockCSAW CTF Qualification Round 201610 writeups
- Thor's a hacker nowIceCTF 201610 writeups
- hard to sayHITCON CTF 2015 Quals10 writeups
- r0pbabyDEF CON CTF Qualifier 201510 writeups
- Trivia 50CSAW CTF Qualification Round 201310 writeups
- FANTASY CTFpicoCTF 2025picoctfsolutions.comworked solution
- Rust fixme 1picoCTF 2025picoctfsolutions.comworked solution
- Rust fixme 2picoCTF 2025picoctfsolutions.comworked solution
- Rust fixme 3picoCTF 2025picoctfsolutions.comworked solution
- Base3200NahamCon CTF 20249 writeups
- binhexapicoCTF 2024picoctfsolutions.comworked solution
- Blame GamepicoCTF 2024picoctfsolutions.comworked solution
- BoxCutterCyber Apocalypse 2024: Hacker Royale9 writeups
- CharacterCyber Apocalypse 2024: Hacker Royale9 writeups
- Collaborative DevelopmentpicoCTF 2024picoctfsolutions.comworked solution
- Commitment IssuespicoCTF 2024picoctfsolutions.comworked solution
- Czech Where?IrisCTF 20249 writeups
- dont-you-love-bannerspicoCTF 2024picoctfsolutions.comworked solution
- endiannesspicoCTF 2024picoctfsolutions.comworked solution
- Flag CommandCyber Apocalypse 2024: Hacker Royale9 writeups
- JsfudgeLA CTF 20249 writeups
- Log ActionUIUCTF 20249 writeups
- LootStashCyber Apocalypse 2024: Hacker Royale9 writeups
- SansAlphapicoCTF 2024picoctfsolutions.comworked solution
- Stop Drop and RollCyber Apocalypse 2024: Hacker Royale9 writeups
- Super SSHpicoCTF 2024picoctfsolutions.comworked solution
- That's Not My BaseNahamCon CTF 20249 writeups
- Time MachinepicoCTF 2024picoctfsolutions.comworked solution
- UnbreakableCyber Apocalypse 2024: Hacker Royale9 writeups
- Voice ChangerUofTCTF 20249 writeups
- X Marked the SpotUIUCTF 20249 writeups
- Android DropperCSAW CTF Qualification Round 20239 writeups
- baby-walletcorCTF 20239 writeups
- chronopicoCTF 2023picoctfsolutions.comworked solution
- Council Of Apes GlacierCTF 20239 writeups
- EVMVMLA CTF 20239 writeups
- Fractional FlagCryptoverse CTF 20239 writeups
- Full Chain - Wall RoseHITCON CTF 2023 Quals9 writeups
- funny factorialsAmateursCTF 20239 writeups
- GlacierVault GlacierCTF 20239 writeups
- Group ProjectUIUCTF 20239 writeups
- MHK2Google Capture The Flag 20239 writeups
- Morphing TimeUIUCTF 20239 writeups
- perfect pictureImaginaryCTF 20239 writeups
- PermissionspicoCTF 2023picoctfsolutions.comworked solution
- poetryPlaidCTF 20239 writeups
- python-garbage-compilerPatriotCTF 20239 writeups
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