This is an organized, PR-able list of wargame sites. If you know of a (reasonable) wargame site not on this list (and there are definitely some), shoot me a PR. If there is a wargame site that is on this list that should not be there (and there are definitely some), shoot me a PR.
You can aggregate your score across many of these sites by registering on WeChall.
Legend
recommended wargame
beginner difficulty
downloadable challenges
no scoreboard
bitrotted
only playable in language X
The chals below are listed with recommended ones first, then the rest in alphabetical order.
Beginner
General
- PicoCTF
- root-me
- W3Challs
- WeChall
- archive.ooo
- Backdoor
- Bright Shadows
- CHALLENGE LAND
- CodeEngn
- CTFLearn
- ctfs.me
- ExploitExercises MainSequence
- ExploitExercises Nebula
- hacker.org
- HackerGateway
- HackMe
- HackTheBox.eu
- HackThis!!
- HackThisSite
- HallsOfValhalla
- hax.tor
- HellBound Hackers
- Komodo CTF
- Ma's Reversing
- Mod-X
- Net-Force
- NewbieContest
- OverTheWire Semtex
- RingZer0Team Online CTF
- SmashTheStack Logic
- The Enigma Group
- VulnHub
- WTHack
- ksnctf
- akictf
- MMA CTF
- MNCTF
- 柚子胡椒CTF
- CpawCTF
- CpawCTF2
- YEHD 2015 CTF
- MAGURO β
Binary Pwning
- pwnable.kr
- pwnable.tw
- ExploitExercises Fusion
- ExploitExercises Protostar
- IO64
- IO
- IOarm
- Microcorruption
- OverTheWire Behemoth
- OverTheWire Drifter
- OverTheWire Manpage
- OverTheWire Maze
- OverTheWire Narnia
- OverTheWire Unomo
- OverTheWire Vortex
- Pwn.college
- ROP
- ROP Emporium
- pwnable.xyz
Binary Reversing
Mobile
Web
- alert(1) to win
- websec.fr
- webhacking.kr
- 0xf.at
- Google Gruyere
- HackBurger
- HackerTest
- OverTheWire Natas
- XSS Game
- XSS game area
- XSS PwnFunction
Crypto
Cloud
Unsorted
- Ethernaut (Solidity)
- IO07
- SmashTheStack Amateria
- SmashTheStack Tux
- HackSys Extreme Vulnerable Driver
I acquired the links here over a very long career. At some point, I started noting down resources that led me to these links. They are: