 The collector's edition featured a different packaging, an artbook, bonus in-game content, a behind-the-scenes DVD, and one issue from the "" comic series.Although "Mass Effect 2" was released at the end of the month, it became the second best-selling game of January 2010 with 572,100 units sold, behind Nintendo's "New Super Mario Bros. Wii".Shortly after "Mass Effect 2" was released, the game's font size and coloring was criticized for being too difficult to read on some standard-definition televisions.