Linux Boxes:
Lame
brainfuck
shocker
bashed
nibbles
beep
cronos
nineveh
sense
solidstate
node
valentine
poison
sunday
tartarsauce
Irked
Friendzone
Swagshop
Networked
jarvis
Windows Boxes
legacy
Blue
Devel
Optimum
Bastard
granny
Arctic
grandpa
silo
bounty
jerry
conceal
chatterbox
Forest
BankRobber
More challenging than OSCP, but good practice
Jeeves [Windows]
Bart [Windows]
Tally [Windows]
Active [Windows]
Kotarak [Linux]
falafel [Linux]
Devops [Linux]
Hawk [Linux]
Netmon [Windows]
Lightweight [Linux]
La Casa De Papel [Linux]
Jail [Linux]
Safe [Linux]
Bitlab [Linux]
Beginner friendly:
Kioptrix: Level 1 (#1) [ok]
Kioptrix: Level 1.1 (#2) [ok]
Kioptrix: Level 1.2 (#3) [ok]
Kioptrix: Level 1.3 (#4) [ok]
FristiLeaks: 1.3 [ok]
Stapler: 1 [ok]
PwnLab: init [ok]
Pluck: 1 [ok]
W1R3S: 1.0.1 [ok]
Intermediate:
Kioptrix: 2014 [ok]
Brainpan: 1 (Part 1 of BO is relevant to OSCP. egghunting is out of scope though)
Mr-Robot: 1 [ok]
HackLAB: Vulnix [ok]
Not so sure (Didn't solve them yet):
VulnOS: 2 [ok]
SickOs: 1.2 [ok]
/dev/random: scream
pWnOS: 2.0
SkyTower: 1
IMF
Lord of the Root 1.0.1 [ok]
Tr0ll
Pegasus
SkyTower [ok]
Windows
Metasploitable 3
Bobby: 1 (Uses VulnInjector, need to provide you own ISO and key.)
​