Global Defense Network - Version 1.0 The GDN is a combination of fast paced shooter and rhythm action game with an intriguing sci-fi plot spread evenly throughout.The Global Defense Network has released their proprietary training simulator to the public. Charged with defending against aggressive extra terrestrial activity, the GDN has begun to seek out gifted individuals to assist in their efforts. Effective immediately, the formerly classified simulator used to train GDN Agents has been released to the public. The GDN training simulator measures a variety of ability scores, ranging from general aptitude to aggression levels. The GDN administration staff has already begun an international recruitment effort and if you meet their rigid standards, you will be contacted directly. Get the game, test your skills, and see if you are good enough to be a GDN Agent.