I'm having the same problem (PC version, but that doesn't matter). Just bought the collection, only played the arcade versions of Ikari Warriors 1 and 2 so far. Occasionally the direction control freezes, and my soldier keeps running forward even though I'm not making him do so. I'm using a wired 360 gamepad. I don't know whether to keep these games or go for a refund while I still can. I'd LIKE to keep them. The collection seems to be well put together, and I could probably get many hours of enjoyment from it.If there isn't going to be a fix that might not be a good idea, though.