The file is part of a "scene release." Because high-quality games are often several gigabytes in size, release groups split the ISO (disk image) into smaller, manageable .rar chunks (Part 1, Part 2, etc.).
The tag -DARKSiDERS at the end of the filename serves as a digital signature, identifying which group bypassed the game's DRM (Digital Rights Management). Risks and Considerations Lets.Sing.2019-DARKSiDERS.part2.rar
The .rar format is used to reduce file size and provide error-checking (SFV) to ensure the data wasn't corrupted during download. The file is part of a "scene release
Lets.Sing.2019-DARKSiDERS.part2.rar is a non-functional fragment of a pirated game release. It requires the remaining parts of the set to be useful and carries the standard legal and security risks associated with pirated software. However, downloading from unverified mirrors carries a risk
Files from unofficial sources like DARKSiDERS frequently trigger "False Positives" in antivirus software due to the nature of the "cracked" .exe or .dll files included in the final extraction. However, downloading from unverified mirrors carries a risk of actual malware.