Copy & paste from the blog:
"Today I started working on a rank system for Immune.
You get experience (XP) points for crafting, building or killing which define your rank in the game. If you die you lose a few percent of your XP. Maybe I'll add some perks for higher ranks, too, but I am not sure, yet.
After you reached the first rank, you will be able to see it as a colored roman numeral next to your name (see picture)."What do you think should be the advantages for higher ranks?
I thought about crafting restrictions for lower levels, but I'd love to hear your ideas!