Games like this are becoming increasingly rare on the market. It will always be hard to make them original, and Tunguska is no different. As far as graphics go, it is not hard to render good backgrounds on stagnant scenes in games like these, so the graphics should be good, and Tunguska does this reasonably well. The sound is atmospheric, but the voice overs are wooden and don't do the game justice.
That said, these are not the reasons you buy a game like this. You want puzzles, not too fiendish, not too simple. This delivers. Despite the fact some seem illogical at first, if you have a little think about it, there is always some logic, it just requires a little lateral thinking. But there is a slight glitch in the game that makes these things easier to the casual gamer. You can easily discover which objects you can 'combine' simply by picking it up and 'hovering' it over everything in sight. If the mouse icon goes green, you can use them together. This has he unfortunate drawback that, when you are stuck in the game, all you have to do is hover the objects over each other and you will come across the solution, by luck rather than skill.
The game is also short. It did seem to end rather suddenly and I was quite disappointed. A few things were left unexplained, especially the people in black capes, and what eventually happened to Oleg and co. At times the plot was tired and predictable, and you will find yourself clicking through some of the dull talking scenes.
But, that said, if you are looking for a challenge, and you haven't played a game like this for a while you will be in your element. The gripes I have concentrated may seem quite major, but in fact they are not, but it was a shame it did not last a bit loner. I think, in all, this took me about 10 hours start to finish with no help.
There is another problem with games like this, as my friend discovered. There are so many walkthroughs available on the internet it does take some restraint especially when you come up against a difficult puzzle.
Oh, and as for the outtakes at the end....poor to say the least. Why bother with things like that on a computer game? Not remotely funny.