Puzzles, Riddles, Crackme, Programming Challenges...

Challenges.md

• [+Ma's Reversing] (http://3564020356.org/)
• [2enigmatik4u] (http://2e4u.net/)
• [Amnesya.com] (http://www.amnesya.com/riddles/howtoplay.htm)
• [Brain Bashers] (http://www.brainbashers.com/)
• [Brain Den] (http://brainden.com/)
• [Braingle] (http://braingle.com/)
• [College Puzzle Challenge] (https://www.collegepuzzlechallenge.com/)
• [Crackmes.de] (http://crackmes.de/)
• [E.B.O.N.Y.] (http://ebony.extra.hu/index.html)
• [Electrica] (http://www.caesum.com/game/index.php)
• [Enigmatik] (http://enigmatik.epikurieu.com/)
• [Escape] (http://www.angelfire.com/ne/warp/)
• [Eudyptula] (http://eudyptula-challenge.org/)
• [Exploit Exercises] (https://exploit-exercises.com/)
• [Hack This Site!] (https://www.hackthissite.org/)
• [HackerGames.net] (http://hackergames.net/)
• [HackThis!!] (https://www.hackthis.co.uk/)
• [Had To Play On] (http://hadtoplayon.com/)
• [HDWhite.org] (http://hdwhite.org/puzzle/)
• [IBM Ponder this] (http://domino.research.ibm.com/Comm/wwwr_ponder.nsf/pages/index.html)
• [Mind Cipher] (http://mindcipher.com/)
• [Mod-X Security] (http://www.mod-x.co.uk/main.php)
• [Net-Force] (https://net-force.nl/)
• [NewbieContest] (http://www.newbiecontest.org/)
• [Notpron] (http://notpron.com/)
• [OddPawn] (http://oddpawn.com/)
• [Ouverture Facile] (http://www.ouverture-facile.com/)
• [Programming Challenges] (http://www.reddit.com/r/programmingchallenges)
• [Puzzle to me] (http://puzzletome.com/)
• [Python Challenge] (http://www.pythonchallenge.com/)
• [Pzzls] (http://pzzls.com/)
• [Rankk.org] (http://www.rankk.org/)
• [Regex Crossword] (http://regexcrossword.com/)
• [RegHex] (http://rampion.github.io/RegHex/)
• [Root Me] (http://www.root-me.org/)
• [SmashTheStack] (http://smashthestack.org/)
• [TheBlacksheep] (http://bright-shadows.net/)
• [This Is Not a Puzzle] (http://thisisnotapuzzle.com/)
• [Tim Tang Test] (http://www.timtang.com/ttt/)
• [Try2Hack.nl] (http://www.try2hack.nl/)
• [TryThis0ne] (http://trythis0ne.com/)
• [Ultimate Riddle] (http://ultimateriddle.altervista.org/)
• [URL Brain Damage] (http://www.urlbraindamage.com/)
• [WeffRiddles] (http://www.weffriddles.com/)