Once contracted by the Emerald City military base, the work immediately began to create bio-organic weapons to please the commander. This was their first creature to please him, because G-Virus administration to a common pet was not hard to do. After a few months of testing, they deemed the Stalker FG-005 a success, and immediate production began. Many were sold outside of Emerald City, only a few staying within the limits once the outbreak hit.