Perl is a dynamic programming language created by Larry Wall and was first released in 1987. Perl borrows features from a variety of other languages including C, bash, AWK, sed and Lisp.

Perl is usually good for searching for data and matching variables. Structurally, most people believe that Perl is a brainfuck comparable to that of brainfuck.

For moar info, see Perl.

Some of the tools the Insurgency uses, such as mt_pulse.pl, use Perl. Linux and BSD distros usually include Perl as a default package. Windows users should get Strawberry Perl and Macfags should get ActivePerl from the link below.