In order for you to play Fantasy Strike on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Ubuntu 12.04 and newer
Processor (CPU):
Intel Core i5-4302Y @ 1.6GHz, Celeron G1840 @ 2.8 GHz / AMD Athlon II X3
Memory (RAM):
4 GB RAM
Graphics Card:
GeForce GT 555M, 9800 GTX / Radeon R7, HD 8500
Storage:
6 GB available space
Sound Card:
-