Easter Eggs in Portal/Portal 2 [closed]
Solution 1:
I couldn't find any comprehensive lists, so try the following:
- GamesRadar - Portal 2 Easter egg guide: 30 secrets and references you may have missed
- Steam Forum - List of easter eggs *spoilers*
- Easter Egg Archive - Portal Easter Eggs
You can also try searching the Half-Life Wikia for "Portal easter egg".
Addendum: The site will eventually move to http://combineoverwiki.net/