When I was attempting under the radar, I flew under every bridge, as I did so, a notice appeared at the top and said, you have so many bridges left to fly under for the acheivement. On the map there were "trophies", but as I got to the last bridge , the trophies disappeared and I couldn't get the acheivement for under the radar. I didn't use cheats so I don't understand why I can't get it? Can anyone explain? It's forty g's!
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I had to fly through the last bridge twice today. If you have a six star wanted level then you have to do the remove wanted level cheat repeatedly while flying under. The trophies on the map only stay there momentarily, it's just a quick reference of where to go.
The same has happened to me.
Every time you fly under the bridge, the trophies pop up.
However, they only pop up for a few seconds, so it's best to place a waypoint on the trophy you are going for.
If you leave the helecopter, or die, you'll have to do them all again.
The same happened to me but it turned out that my notifications were turned off, To check Go to
Guide>Settings>Notifications There should be a checkbox, make sure it's checked. Then to see if you got the achievement head into the achievement section of the xbox dashboard and look for the achievement
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