This excerpt taken from the ATVI 10-K filed Jun 9, 2005.
We are exposed to seasonality in the purchases of our products.
The interactive entertainment software industry is highly seasonal, with the highest levels of consumer demand occurring during the year end holiday buying season. As a result, our net revenues, gross profits and operating income have historically been highest during the second half of the calendar year. Additionally, in a platform transition period, sales of game console software products can be significantly affected by the timeliness of introduction of game console platforms by the manufacturers of those platforms, such as Sony, Nintendo and Microsoft. The timing of hardware platform introduction is also often tied to holidays and is not within our control. If a hardware platform is released unexpectedly close to the holidays, this would result in a shortened holiday buying season and could negatively impact the sales of our products. Further, delays in development, licensor approvals or manufacturing can also affect the timing of the release of our products, causing us to miss key selling periods such as the year end holiday buying season.