Final answer:
Mark's action of copying and distributing an expensive computer game without permission constitutes software piracy, which is a form of copyright infringement and is illegal.
Step-by-step explanation:
When Mark makes unauthorized copies of an expensive computer game to give to his friends, he has committed the cybercrime of Software piracy. Software piracy falls under the broader legal umbrella of copyright infringement, wherein the copy and distribution of copyright-protected material without permission from the copyright holder are unlawful. This type of activity is a direct violation of the rights of the creators and owners of the copyrighted material. The Supreme Court has made decisions that reinforce these principles, notably in the MGM Studios v. Grokster case, where distributing file-sharing software that enables copyright infringement was deemed legally accountable.