Robux

Robux is used as game passes or accesories for avatars or purchasing games in Roblox. Though, in Clone Tycoon, Robux is used to purchase more Cash or Gems or to rain clones.

Overall, robux is only used to only plan an attack on a  base or to gain the other 2 Currencies.

How to obtain Robux
It is simple. You can either Those are the only 2 ways you can get robux.
 * Buy robux online
 * Get gift cards to redeem codes