The investigators are testing a new, smartphone videogame-based intervention for smoking cessation.

The investigators have developed a novel smartphone videogame, where smokers are required to submit breath carbon monoxide samples to demonstrate smoking abstinence, and where they will earn game-based rewards contingent on meeting CO goals. Players will be working with teams to earn group and social rewards to help advance their game.

Inclusion Criteria:

• Inclusionary criteria: Participants will be required to be of legal smoking age (>19 in Alabama, Alaska, New Jersey, Utah, and in Onondaga, Nassau and Suffolk Counties in New York, > 18 years of age in the remainder of the United States). Participants must also report smoking >10 cigarettes per day, report smoking for >2 years, answer 8 or higher on a Likert scale asking how much the person wishes to quit smoking right now (1 = not at all, 10 =very much), have a smartphone with a data plan and active contract extending for at least two months from the enrollment date (i.e., the duration of the study), and reside in the U.S. Participants in the study must submit an initial CO reading > 10ppm (to prevent nonsmokers from enrolling in the study), Literacy will be assessed by having the participant read the first few lines of the consent form out loud, and will be an inclusion criterion because elements of "Breathe Free" will require reading.

Exclusion Criteria:

• Individuals will be excluded from the study if they report smoking any combustible products >2 times per month, report unstable medical/psychiatric conditions that might interfere with the study objectives (e.g., asthma), report living with someone who smokes in the house, or has a career that results in excessive exposure to CO. All excluded participants will be emailed the following smoking cessation information: the "Clearing the Air" packet developed by the National Cancer Institute, Smokefree.gov, Quitsmokinghelpline.com, and the National Academies Press "Dying to quit."

Participants will not be told whether they are in the control or experimental group.