So I've been playing
DEFCON recently. It is hard to resist its simple gameplay, wonderful aesthetics and the sheer amount of fun that has been packed into every pixel.
Introversion games are like that: basic gameplay hiding a wealth of options and depth. It is a feature that is reflected in their audio visual content as well. Introversion games are hardly going to be known for ground breaking graphics engines but smart graphic design and masterful audio design make their games some of the most artistically arresting of any on the PC.