Example systems and methods related to providing rewards for an online game in response to web-based purchases are presented. In an example, an online catalog webpage including information describing a product available for purchase is generated. The online catalog webpage includes code instructing a device receiving the online catalog webpage to issue a request to an online gaming system to determine an in-game reward for a user based on the product. The online catalog webpage is transmitted to a client device of the user. An order for the product is received from the client device. The order indicates the in-game reward determined in the online gaming system. An order confirmation webpage is transmitted to the client device in response to the order, and the order confirmation webpage indicates the in-game reward.