I have had good luck with the Maxx and gaming. I have also played FIFA without issue. I have had issue with Asphalt 8 not being available for the Maxx while it is for Galaxy S4 and Nexus 7.
Do you work for the hospitals? I am in IT support for Umass.
Anyways the Maxx is a great phone overall! I disabled the touchless controls and got rid of the bloatware. I can get about 2 days on a charge with good use