Board Thread:Lores/@comment-31018335-20161218210328

Money and rank are purely symbolical things to measure your worth to the survivors/weapons manufacturers/suppliers. Taking down targets like brutes and leapers are worth more "money" because they are harder targets to take down. As you exterminate more of the zombie scum, people keep count, so that you can be given a "rank up" when you are deemed to be worth enough resources to provide more powerful weapons to.

tl;dr murder more zombies, be considered worth more to survivors, get better weapons 