http://www.hackthissite.org/
http://www.try2hack.nl/ (Back soon, offline now)
http://www.hackr.org/
http://www.ninebows.com/
http://www.hackits.de/
http://www.overthewire.org/
http://www.daedlaus.com/sk00l/
http://3564020356.org/index.html#intro
http://www.blind-dice.com/
http://www.chumley.biz/
http://es.geocities.com/roger_fan_morvill/ (Choose english or Spanish, LOADS OF POPUPS)
http://membres.lycos.fr/cvpauline/ (Javascript password cracking, with ads)
http://crackmes.de/
http://www.geocities.com/krypticl/ (Encryption, With ads)
http://www.dareyourmind.net/
http://mod-x.co.uk/main.php
http://www.caesum.com/game/
http://www.angelfire.com/ne/warp/
http://www.fatetek.net/
http://www.osix.net/
http://www.hack4u.org/
http://geocities.com/hiddenbunkerlabs/challenge.html (With ads)
http://masticore.neonnero.com/HackorDie/?page=main
http://www.hackquest.de/
http://wargame.ionichost.com/ (Ugly site)
http://www.honeynet.org/misc/chall.html
http://www.web-cafe.gr/memorydump/
http://www.mr01001101.co.uk/
http://www.net-force.nl/
http://www.angelfire.com/clone/hackerchallenge/ (Ads)
http://www.geocities.com/hacker312s/now.htm (Ads)
http://www.rsa.com/rsalabs/node.asp?id=2091
http://www.slyfx.com/
http://testzone.i8.com/chalstart/challenge.html (Ads)
http://www.bright-shadows.net/
http://www.tigertools.net/contest.htm
http://www.trythis0ne.com/
http://www.underground-development.de/? ... /index.php
http://www.geocities.com/ayp1320/HackGame/game.html (Ads)
http://www.freewebs.com/unseeneyes/wargames/
http://www-public.rz.uni-duesseldorf.de ... ehack.com/
http://cypher.extremecast.com/ (Looks cool)
http://www.claudio.co.nz/
http://isatcis.com/
http://www.hackerforever.com/
http://www.geocities.com/famousbruce/hackpage.html (Ads, but no regestration)
German
http://www.happy-security.de/
http://www.yatta-tempel.de/yorpg/schulhp/index.php
http://mitglied.lycos.de/markie/Hackits.htm (with ads)
http://hackits.homestead.com/ (With ads)
http://www.h4ckthis-p4ssb0x.de.vu/ (With ads)
http://sternwart.ch/sternwart/seite5.htm
http://www.insider-computerfreaks.com/b ... ckmich.php
http://www.kayl.de/?nav=hackits
http://www.mibs-challenges.de/
http://challenge.quizzers.info/index.php
http://www.learning-crew.com/frame1.htm
http://www.geocities.com/thewho_lebt/hackits.htm (Ads)
http://mitglied.lycos.de/zsd/hackits.html (Ads)
http://happy-security.de/
French
http://alph4net.free.fr/index_challenge.htm
http://bigchallenge.free.fr/
http://www.membres.lycos.fr/stonygamer/ (with ads)
http://membres.lycos.fr/bepsone/site.php (With ads)
http://www.noxistes.org/
http://www.snscrew.net/site.php?main=challenges
http://gaetanpsg.free.fr/telechargement ... euves.html
http://www.newbiecontest.org/
Spanish
http://es.geocities.com/roger_fan_morvill/ (Choose english or Spanish, LOADS OF POPUPS)
http://www.mundofree.com/tribal/ (Flash)
http://www.hackerss.com/
Russian
http://quest.antichat.net/intro.html
http://quest.ghc.ru/
Italian
http://win.glesius.org/
http://www.netfriend.it/hackit/default.asp
http://spazioinwind.libero.it/blackdrag ... _game.html
Polish
http://www.uw-team.org/
enjoy
