I won't call them "eastereggs", but I think they're funny enough to be mentioned here:1. I made a "mistake" in Alchemy and "invented" Perfume - as the potion was marked as "unknown", Geralt drank it, got drunk and made a funny comment (translated into english from memory): "tastes awfull, but it makes your breath smell beautifull..."2. When finishing the "Rat" Quest for Coleman in Act II (after combining it with a little Salamandra-Hunt in the night) during the conversation with Coleman after you found out, that he works for Vincent, Geralt aks, if they made any advances on the Salamandra-case, Coleman replies, that they are close, but that there is some guy running around at night killing the persons in the Salamandra who they used to get closer to the people behind them. Geralt seems a little bit shocked and frightend (at least in the german dubbing) and with unsecure voices askes, if they have a description of that guy, which Coleman has not. Geralt seems relieved and assures him, that they will have more sucess in the future...(Might be intended to hint something that will happen later, but at the moment in play, it seemed so fitting, that this passage was ment to point to Geralt, and the cutscene was so fitting, you could almost read his thoughts from his face if he might have done something wrong - good programming! I had to pause for a while to laugh)