@GG,
You are looking for a one word answer for which there is none. Without writing a long-winded Law Review, I have given you enough material to try for a refund, or not. It's now up to you. I can only guide you, and others to the watering hole. I can't make you drink it. Some of the downloading sites specifically state "No refunds on this item". Impulse is one of them. But if this game malfunctions/don't work, then this statement can be fought. I don't now what else to tell you.
I have not seen any invisible walls, and I'm pretty deep in the story-line. I often go into LA via Interstate 5, and Highway 101 in both directions. So I don't know what else to say on the matter. So far for me at least, I have not experienced any bugs that would qualify for a refund. I've only heard of them.
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