: Obtain the installer (usually an .exe or .msi file).

The very first Chicken Invaders (1999) was originally released as freeware.

: Because these games are over 20 years old, you may need to right-click the .exe file, go to Properties > Compatibility , and select Windows XP (Service Pack 3) to get them to run correctly. 3. Installation Steps

: If the download is a .zip or .rar file, right-click and select Extract All .