Older brother to Dustin Hammer. Served alongside his brother in the 75th Ranger Regiment. Instead of being sent with his brother to the Middle East and Africa, Axel spent his time in South America. Taking part in the US invasion of Panama during Operation Just Cause. Provided security for a team of "off the books" researchers from the CDC operating deep in the jungles of Africa shortly after 9/11. Lost contact with Dustin just as the outbreak started to spread. Dustin's handlers informed Axel just before he went silent, that he was operating in Chernarus. Made his way into Chernarus by paying off locals close to the border. Axel is looking for Dustin to inform him that his fiance did indeed survive the outbreak. Might have information regarding the virus.