In what used to be Dr. Hermann's house, there is a PC you can use to play Space Attack, a Space Invaders variant. Coincidentally or not it shares the same name with another variant, released in 1979 by SEGA for the arcades.
2011 - #3 Adventure of the Year (Readers' Vote)
PC Games (Germany)
Issue 01/2012 - Best Adventure Game in 2011 (Readers' Choice)