From a legal standpoint, using cracks to bypass game protections is a gray area but generally leans towards being illegal. Game developers and publishers invest significant resources into their products, and circumventing protections can be seen as a form of copyright infringement.
For gamers and developers alike, the desire to play or create offline versions of games can inspire new projects. Some enthusiasts create their own game modes or modifications that can be enjoyed without an internet connection.
Rather than using unknown "cracks" from sketchy websites (which often contain malware), the BF2142 community has established safe, well-documented methods to play offline or on private servers: