Chicken Invaders: Revenge of the Yolk (known also as Chicken Invaders 3) is the third game in the Chicken Invaders main series, released on 11 November 2006 as a Christmas Edition, with the regular version releasing on 20 January 2007. The game is similar to The Next Wave in many respects, with the addition of new game mechanics and featuring 4-player cooperative play. It was intended as the final game in a planned Chicken Invaders trilogy, until the release of Ultimate Omelette in 2010. The game was also the first to spawn an Easter Edition, released on 12 February 2010.
[Source: wikipedia.org]