Leviathan
Leviathan: (noun) a sea monster. (adjective) huge; enormous.
About Leviathan
This wargame doesn't require any knowledge about programming - just a bit of common sense and some knowledge about basic *nix commands.
Leviathan's levels are called leviathan0, leviathan1, ... etc. and can be accessed on leviathan.labs.overthewire.org through SSH on port 2223.
To login to the first level use:
Level Access
Use these credentials to access the level.
Data for the levels can be found in the homedirectories. You can look at /etc/leviathan_pass for the various level passwords.