A couple of days ago, I typed "eastereggs_enable 1" into console, and a chat message popped up, the text being something along the lines of "TacoGames has found easter egg #3" Then a second message underneath that said "They have found 1/3 easter eggs!" a bunch of people wondered what this was, so I just thought I'd clarify
So, the first easter egg is a chat message, all you have to do is type "4bigz" into chat and you will get the first easter egg
The second easter egg is a console command, if you don't know how to access the console, I suggest looking it up, but the second easter egg is "cc_egg2" into console
The final easter egg is, of course, "eastereggs_enable 1" into console, after all of this is done, nothing important happens, but it's fun to see how many people react to it.