A "cracked version" refers to software or media that has been illegally modified to remove copy protection or licensing restrictions. It allows people to use or access the content without paying for it. Full definition
Also, between «crackers» it's considered a feat to publish the first cracked version of a game. (law.stackexchange.com)
«The problem you have encountered is a hook in the copy protection, to catch out people who try and download cracked versions of the game for free. (riddlethos.com)
Using inspired guesswork and elementary group theory, three Polish mathematicians — Jerzy Rózycki, Henryk Zygalski and Marian Rejewski — fully cracked this version of Enigma in 1932. (discovermagazine.com)