Koodo Mobile, a new Canadian carrier that bills itself as "fat free" because of its cut-rate plans, has hooked up with mobile marketing agency TAXI 2 on an interactive game for commuters.

In an apparent effort to spread the word about its new nationwide plans, the mobile operator is inviting folks waiting for trains in the Montreal subway system to play "Where's Koodo?" Loaded onto 12 touchscreen kiosks in various subway stations, the "Where's Waldo?" knockoff invites commuters to search for Koodo characters in a depiction of a cluttered urban landscape. The game also tries to communicate all the benefits of Koodo's service; users can navigate through the company's monthly plan information on-screen as well.

The campaign runs through the end of September.