For the Browser version, any area with enough intersecting streets will work.
For the Mobile App version I actually found a good reference at this Mashable article : 1.
Times Square, NY Clue: Don't drop the ball on the eve of your victory!
2.
Arc de Triomphe, Paris
Clue: Triumph is délicieux.
3.
Batu Caves, Kuala Lumpur Clue: Does a Galaxian bonus await at the top of those 272 steps? 4.
Plaza de la República, Buenos Aires
Clue:
Chomp your way to independence down seven lanes of July.
5.
Niagara Falls, Ontario Clue: PAC-MAN and Ms. PAC-MAN can't agree on which side is prettier: the American or the Canadian.
Which side do you fall on, eh? 6.
Aman Square, Ad Doqi Clue: After a chat with the Sphinx, PAC-MAN sounds more like "Dokki Dokki".
7.
Fraumünster Church, Zurich
Clue:
Pause game play to admire Chagall's stained glass windows and have a bit of chocolate.
8.
Googleplex, California Clue:
Can you score 10^(10^100) points?
9.
Hanover Square, London Clue: Whether they're flashing blue or sporting their natural colors, Blinky, Pinky, Inky, and Clyde are always kakkoii.
Even Vogue agrees they're living in the trendiest of neighborhoods.
10.
Taj Mahal, Uttar Pradesh Clue: Previous PAC-MAN lives don't get to rest in a white marble mausoleum.
11.
Metropolitan Art Institute, Phoenix
Clue:
Head to the valley of the sun and earn your grade in the art of the game. 12.
Plaza Del Ejecutivo, Mexico City Clue:
How well can you navigate the radiating streets of the distrito federal?
13.
Neues Rathaus, Munich
Clue: Victory is like gothic glockenspiel musik to our ears.
14.
Victoria Square, Adelaide Clue: Pay special attention to Blinky - he might blend in with the dreaming red kangaroos!
gaming.stackexchange.com/users/None/
On the desktop version, you can go anywhere with enough roads for Pac-Man to move around (I did it around my house), but on the app it's limited to the places previously mentioned by Thebluefish.
gaming.stackexchange.com/users/107021/Ay-Kriv
You are not limited to only certain cities.
You can play Google Maps Pac-Man anywhere there is a sufficient number of intersecting streets.
Here are links to a few places I was able to start the Pac-Man game: Seattle
, WA: https://www.google.com/maps/@47.6044359,-122.3309277,18z/data=!1e3 Cairo, Egypt: https://www.google.com/maps/@30.041075,31.2018952,18z/data=!1e3 Kremlin, Moscow, Russia: https://www.google.com/maps/@55.752023,37.617499,18z/data=!1e3
gaming.stackexchange.com/users/27551/Tom
The one about kakkoi actually refers to Kitagawa in Japan.
gaming.stackexchange.com/users/107137/Raven
There has been an update on the Google support page with 16 more locations where it can be played!
So far I've got: Wrigley Field, Chicago Roman Agora (North of Acropolis) in Athens Oxford Circus, London Residence Assounfou Hotel in Marrakech Sagrada Família, Barcelona Colosseum, Rome Catherine Palace, Saint Petersburg Peace Corps, Washington DC
gaming.stackexchange.com/users/107150/Alex
For this year's April Fools, Google has a Pac-Man option on GoogleMaps.  However, it cryptically references clues in which you can play the Pac-Man maps on, as apparently not all cities are supported.  There's a list of clues i t has on its FAQ page , but I don't understand most of them.  Which cities can I play Pac-Man in?
Which cities can I play Pac-Man in?
gaming.stackexchange.com
<google-maps-pacman>
gaming.stackexchange.com/questions/212054
gaming.stackexchange.com/users/18916/korrasaur
For the Browser version, any area with enough intersecting streets will work. You can go anywhere with enough roads for Pac-Man to move around but on the app it's limited to the places previously mentioned by Thebluefish. In order to play google's pac man, there have to be sufficient number of intersecting streets.
It is suggested that google's pac man can be played anywhere.