Yes, ok, a very good game for its price (£9.99) and very similar to DOOM 3, which is highly beneficial for my self, personally, being a hardcore fan of all the DOOM series.
BUT this has to be THE MOST unrealistic game i have ever played! This game has you walking up walls, leaving your body for one of a ghost/spirit and you CAN'T die!
If you "run out" or lose all of your health, you are taken some place out of the level and re-instated within 30 seconds with half to two-thirds health remaining!
Having said all of the above, the game is not too bad, there are a lot of easy achievements to be gained and you can find your self 50/60 Gamerscore points richer within 30 minutes.
There are some entertaining aspects to the game, as the levels progress with improved weaponary and some sort of challenge in terms of enemies.
A worth while purchase for £9.99, but not the best First Person Shooter out there by far!