 Contained the first ever video game Easter Egg: if you drop the  correct items in specific spots, the game gives you access to a  secret room that shows the name of the programmer. In the late 70s  and early 80s, Atari frowned on the programmers giving themselves  individual credit for their games, so Warren Robinett (qv) snuck  this feature in Adventure in order to give himself the credit he  felt he deserved.