This excerpt taken from the ATVI DEF 14A filed Apr 22, 2009.
Termination of Employment and Change of Control Arrangements
To attract and retain talented executives, we provide severance and change of control benefits, which are negotiated with each executive officer in connection with a new or renewed employment agreement. In addition, Messrs. Kotick and Kelly are eligible to receive change of control benefits that the Compensation Committee believes remain consistent with market practice and will assist these individuals in maintaining objectivity in the context of a potential change of control transaction. These benefits for each of the named executive officers are described under "Potential Payments upon Termination or Change of Control" below.