At first it reminded me a lot on mtg. It is really fun to play. Indeed it requires a CD provided by GOG. Not sure what to think about it yet. OnLinux the start.sh caused graphical errors which makes it unable to play but GOG support and Forum were really helpful. One can just start the binary directly and the game will start just fine.
There is no tutorial and since the game doesn't look very interesting from the beginning, I decided to give it back. Runs fine on Linux with playit scripts.
First mission will get you step by step through the game mechanics. The challenges increases and keep the game interesting. Love it =)
