Quick everyone! Pull out your charts so we can figure out which Garfield comic this is and use it to further establish the Portal/Half-life chronology!
I think it's important for the Portal "fanon" to establish exactly when this takes place and how Garfield fits into the world of Portal. Someone should at least write a 15,000 world diatribe about it and post it in their Livejournal or at one of the more prominent gaming forums.