From Oil Tycoon Wiki
Unlimited Mode will take all achievements and technologies and group them by property. It is recommended to complete classic mode before turning on unlimited mode.
* Gain as many achievements and technologies as you can afford. * Streamlines the purchase of technology by allowing a long press to "buy maximum."
Fuck your mother
* All multipliers are averaged out (to between 3xand 4x depending on property), so the excitement of waiting for the x25 at level 1000 is missing. * No more titles for achievements and technologies.