Miragia consists of a domed city that constantly disappears and reappears, as do the crystal platforms inside the level. In the world map, it will not appear if Keen is standing in its spot while its hidden. Keen has to wait for it to completely appear before he can enter it. The level name probably comes from the word mirage, as the city appears to be a mirage that fades in and out in the desert.
Miragia is probably the strangest and most distinctive level in all the Keen games. There is no explanation at all about its origins or nature. Miragia may be an outpost, that continually hides itself to prevent the dangerous creatures of the Shadowlands from noticing it. It may also be an experimental technology, or even an enchanted or cursed city. In any case, it is very likely it was built either by the current Gnosticenes of the planet, or less likely, by the old (and probably extinct) civilization of the Gnosticene Ancients (which does not appear to be so technologically advanced).
In any case, Miragia has been clearly overrun by the creatures of the Shadowlands, and there are not many traces of its original inhabitants. It is currently populated mostly by Poison Slugs and Mad Mushrooms, though there are some Skypests and Wormouths also.
The level consist of a series of domes, covering several ledges and climbable platforms, most of which fade in and out of existance. If Keen climbs his way up, down, and then up again, he can easily finish the level. However, there are several optional areas of the level which contain many point items, and an extra life reachable from the topmost right area of the level.
- See also Keen 4 Bugs for a bug related to the disappearing crystal platforms.
- See also List of Keen 4 Levels.
- Miragia contains a total of 54,500 points, meaning 64 Shikadi Sodas, 8 Three-Tooth Gums, 15 Shikkers Candy Bars, 6 Jawbreakers, 4 Doughnuts and 5 Ice Cream Cones (6,400 + 1,600 + 7,500 + 6,000 + 8,000 + 25,000 = 54,500). The number of drops is 64. The Lifewater Flask is hidden in the lower right corner of the level.