This chart of the Top 10 Board Games (hobby channel) reflects sales in Spring 2015.  The charts are based on interviews with retailers, distributors, and manufacturers.
 

Top 10 Hobby Channel Board Games – Spring 2015

Title

Publisher

1

Catan

Mayfair Games

2

Ticket to Ride

Days of Wonder

3

Star Wars Imperial Assault

Fantasy Flight Games

4

Pandemic

Z-Man Games

5

XCOM

Fantasy Flight Games

6

Alchemists

Czech Game Editions

7

Betrayal at House on the Hill

Wizards of the Coast

8

Roll for the Galaxy

Rio Grande Games

9

Castles of Mad King Ludwig

Bezier Games

10

Dead of Winter

Plaid Hat Games

These bestseller lists are from ICv2's Internal Correspondence #88.  For more information on the game market in Spring 2015, see "Hobby Games Market Climbs to $880 Million."

For the lists of the bestselling Collectible Games in the hobby channel, in the mass channel, and over-all, click here.

For the bestselling Card/Dice Games in the hobby channel, click here.

For the bestselling RPGs, click here.

For the bestselling Non-Collectible Miniature Games, click here.

For info on how to get your copy of the ICv2's Internal Correspondence #88, with the full market reports and size estimates, bestseller lists, and reviews, see "ICv2 Releases 'Internal Correspondence' #88."