Xuan-Yuan Sword: Dance of the Maple Leaves

After you complete the underground part of the Demon Tower, you can find a very amusing Easter Egg. You just have to examine a certain object in the underground dungeon (I won't say which one, because it wouldn't be fun to discover). When you examine the object, you find yourself magically teleported into... gasp... the room in which the game was developed! There, you find the developers of the game working with their computers, or simply doing silly things. You can talk to them, and some of them will even teach Hu Yongcheng and Wen Jin new techniques to use in battles!