FPGA Arcade uses Xilinx, Apollo core runs on Altera.
They could port it. Shouldn't be a tremendously huge job, but there would be a few things to take care of. Slight variations on how to implicitly instantiate FIFOs, other memory elements, some hardwired items, perhaps a few other things I'm not thinking of at the moment. Should be a reasonable job for someone competent. It's really a choice of policy and if an agreement could be made between them...
