Tres Lunas

[Herzeg Dva]

http://www.mikeoldfield.com/tr3slunas.php

This "game" (and its sequel) are available for free, since as a commercial project it didn't succeed (for a number of reasons, chiefly due to lack of advertisement and most people wouldn't get it anyway). Might be good for killing time on a boring afternoon.

[Halibut]

Someone else try this first and then tell me if it's good, ta.

[Herzeg Dva]

Basically you interact with objects that either trigger music and/or a bizzare sequence that will lead to another section of the world. You have to collect rings in any random sequence you care to. It's lovely (being made by Mike Oldfield and all) but I'm rubbish at it because I'm too ingrained in the old school way of doing things.