It's so smaller studios with limited budgets can buy pieces that they want to use. Havok is a proud "industry enabler" they say, with better "affordable" tools.
"Havok is determined to continue to be an industry enabler by providing the best resources at an affordable price to all developers," said Havok boss David Coghlan.
"We are excited to be supporting the industry with a business model that allows development teams with limited game budgets to innovate using our industry leading technologies and tools," he added.
The Havok Strike Program includes options for Havok Animation, Havok AI, Havok Behavior, Havok Cloth, Havok Destruction, Havok Physics and Havok Script. This physics technology is used by an awful lot of development studios, like Bungie with Halo: Reach.