They often contain malware targeting older OS like Windows 7.
Batman: Arkham Knight was developed with Windows 7, Windows 8, and Windows 10 in mind. It runs natively on Windows 7 (64-bit). batman: arkham knight download for windows 7
Upon its initial release, the PC port of Arkham Knight suffered from severe performance issues, leading to it being temporarily pulled from sale. It has since been patched and re-released. On Windows 7, the game generally runs well on modern hardware, but it remains a heavy title.
: Occasionally offers the Arkham Collection for free or at a discount. They often contain malware targeting older OS like Windows 7