After being called a noob once too often, the mild-mannered young Kangaroo Bertoswald Esq. bravely volunteered to undergo an experimental procedure at the MANN CO. laboratories. The only information known about this HIGHLY CLASSIFIED experiment is that it involved the newly discovered and highly unstable element, AUSTRALIUM. The result was CAPTAIN AUSTRALIA! This Aussie superhero is dedicated to fighting enemies according to the TF2 ideals.