Many sites offering free versions of older games bundle the files with malware, spyware, or adware.
512 MB NVIDIA GeForce 8600 GT / ATI Radeon HD 2600 XT DirectX: Version 9.0c Cabela’s Hunting Expeditions Free Download
While you may find websites offering "Free Downloads" or "Cracked" versions of Cabela’s Hunting Expeditions, it is important to exercise caution: Many sites offering free versions of older games