Alternatively you can follow my tutorial on how to put those games in your FAT32 partition on the eMMC instead
You still be able to use your MicroSD card for something else while it still have both in one sort of thing. It may be a bit difficult at first try but after you've done it once, the tutorial is seems straight forward and you can do it to all games you want ,

If you want to partition your microSD you can also use Gparted if you preferred GUI mode.