The Adventures of Rick Rocket is an action space battle game in which the player has as goal to defend the earth from alien invasion via its rocket ship. The game comes with 48 missions, more than 30 spaceships, and is available as shareware, but you can download and try it.
In this page we will help you install this demo under Ubuntu 11.10/12.04 (or older). To start the installation of The Adventures of Rick Rocket, open the terminal and issue these commands:
wget -O rickrocketsetup_linux http://goo.gl/9npKe
chmod +x rickrocketsetup_linux && ./rickrocketsetup_linux
Then follow setup instructions:
A shortcut for the game will be created on the desktop, you can drag and drop it into the Unity launcher to start the game from there.
The game homepage can be found here.