This method runs the PC version of the game directly on your Android hardware. This requires a fairly powerful phone (Snapdragon 865 or better recommended) and some technical setup.
Step 1: Download the Emulator The best emulator for running old Windows games on Android is Winlator.
Step 2: Prepare the Game Files
Step 3: Transfer and Load
Step 4: Controls Setup Winlator has a "Touch Controls" feature.
This is the most reliable method. You stream the actual PC game to your phone. It requires a strong internet connection but does not require a powerful phone.
Step 1: Choose a Service You need a cloud gaming service that allows you to install your own PC games (like the one you download from GOG or Steam).
Step 2: Purchase the Game Buy Alien Shooter 2: Reloaded (which includes the Vengeance content) on Steam or GOG.com.
Step 3: Setup on Android
Since written instructions only go so far, I recommend searching YouTube for:
Watch the video before downloading any file to ensure the channel is reputable (look for 100k+ views and active comments).
Whether using Cloud Gaming or Winlator, Alien Shooter is best played with a specific layout:
Cause: Incorrect OBB path or missing permissions. Fix: Ensure the OBB folder name exactly matches the APK's package ID. Use a file manager to manually move the files.