NC credits
From Neocron Wiki
NeoCredits, Credits, or NC is the official currency of Neocron City, it is accepted as a currency by all Factions.
Earning Credits
You can earn NC, by killing mobs, selling loot or items, running Runner Missions for one of the many Factions or earn it as a tip for Tradeskilling.
Spending Credits
You can spend your NC to buy items, travel via Venture Warp or GeneReplicator, tip a Tradeskiller for his service.