GameFAQs - Contains walkthroughs and gameplay hints. - http://www.gamefaqs.com/computer/doswin/game/354448.html
Universal Hint System: Stupid Invaders - Includes hints on finding rooms, and solving problems in the Abandoned House, Dung Factory, and Area 52. - http://www.uhs-hints.com/uhsweb/stupid.php
Cheating Planet - Contains walkthrough by Lone Lines. - http://www.cheatingplanet.com/walkthroughs/s/stupid_invaders.shtml
Stupid Invaders - Official site, with story, characters, video, and downloads including postcards and desktop themes. Requires Flash. - http://www.stupidinvaders.com/