The developers of Unigine have a benchmark called Heaven but they want $495 licensing which is 10x the cost of games for a license. For that reason we balk at using this benchmark for video card review. We could also buy several new video cards for $495.
There are many other free benchmarks and many games bundle free benchmarks with the basic game. Metro 2033 is good example, it can be reviewed and it comes with a benchmark at no extra cost.