For anybody who loves 50's creature films and somehow did not play on the Amiga 20 years ago, there was an awesome game about giant ants, called "It came from the desert".
http://en.wikipedia.org/wiki/It_Came_from_the_Desert
The PC version is available for free from the website of the devs:
http://www.cinemaware.com/clsgame_itcame.asp?sel=pcexe