A downloadable game for Windows and macOS

Marauding space alien drones from another solar system are invading!  The world needs you and your trusty biplane to take to the air and save the universe!

Goal: Avoid obstacles. Destroy invading drones.  Find the invading spacestation.

You can absorb three crashes before having to start over.

Play online here: https://reedoco.io/unity/si17/

manoeuvre: WSAD (or arrow keys)
shoot: spacebar

manoeuvre:  left joystick
shoot: right joystick (to the right to fire)

PlatformsWindows, macOS
Release date Mar 24, 2020
Made withUnity
TagsFirst-Person, Sci-fi, Singleplayer, Unity
Average sessionA few seconds
InputsKeyboard, Gamepad (any)


Play Online at https://reedoco.io/unity/si17/
si17v1_win64.zip 288 MB
si17_v1_mac.app.zip 293 MB

Install instructions

Windows: Download and unzip the 'si17v1_win64' file.  Inside that folder is the executable, named 'Space Invasion 1917.exe'. You can play the game directly from that folder or move it to your Programs folder.  The first time you run the game, you may get a warning that says, 'Windows Protected Your PC'. To grant permission to proceed with opening the file, click 'more info' and then 'run anyway'.

MacOS: Download the .zip file, then click it to uncompress it which will then display the 'si17_v1_mac.app' file. You can run the game from the download location or move it to your applications folder.  The first time you run it, you may receive a security message saying, 'can't be opened because it is from an unidentified developer'.  To resolve this, goto  Apple > System Preferences > Security & Privacy > General. Click the lock icon to unlock, then click 'open anyway' to launch the game.