I found them all by myself. The final was on top of the big geodesic dome that I’d tried scaling a few times before, but which I thought was impossible to get up. In desperation I tried a final time just before I was going to turn the 360 off and go to bed, caught a beam at the correct angle and – bang! – up I went. Never have five glowing green orbs stacked on top of each other looked so sweet.

Also tonight I found a ton of hidden orbs – I’ve now got 232 of the 300 – and a few car-stunt-based achievements.