Description:

GNU Robbo is a free open source port of Janusz Pelc's Robbo
which was distributed by LK Avalon in 1989.

Features
+ Graphical skin support: Oily, Original and Tronic
+ Sound skin support: Default, Free and Oily
+ Support for user supplied music
+ 1113 levels across 28 packs converted from Robbo and Robbo Konstruktor
+ A mouse/stylus driven level designer
+ Support for Alex (a Robbo clone) objects
+ Support for Robbo Millenium objects
+ In-game help
+ Reconfigurable options and controls
+ Support for the mouse/stylus throughout the game
+ Support for keyboards, analogue and digital joysticks
+ Centering of game within any resolution >= 240x240
+ Simple build system to maximize porting potential
+ Support for locales

The game-play of the original is faithfully reproduced with a few modifications
+ Lives has been removed and suicide replaced with level restart
+ Scoring has been removed: goal is level advancement
+ Bears don't endlessly spin around themselves
+ Capsules don't spawn from question marks
+ Solid laser fire is not left live after the gun has been destroyed

Take a look into README.fedora about legal issues cause of missing content.