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.)