Well, Chrome itself is malware, so ignore that. Use Firefox.
(Sigh... inevitably someone will now feel urged to defend Chrome. I can see it coming.
Therefore some explanation: software which installs secretly without the user's consent (in fact, against the user's explicit opt-out) on a scheduled antivirus program update (Avast 7), and which upon finishing its covert install -- again, secretly, and without user consent, changes critical system settings (default internet browser and start page) demonstrates some very obvious malware behaviour. Software that demonstrates malware behaviour is malware.).
I'll just put this here, but Chromium isn't Chrome. So I'm not sure why you even brought up the "Chrome is malware" argument, but I guess it is a more interesting topic. I'm not too fussed about the warning itself, which is rather benign, as I'm under Linux most of the bad stuff isn't even targeted at me, I was just curious to see if other people got that, and to give a heads up to the staff. Clearly Google has this site on its blacklist for some reason, even if the pacman game itself is.. well.. just a game, a priori.