A web-based system for integrating casino gaming with non-casino interactive gaming comprises a central server system, a plurality of player-operated gaming machines, and a player-operating computing device. The central server system offers a plurality of wagering games. The gaming machines are located in a land-based casino and linked to the central server system by a reconfigurable, multi-site computer network such as an intranet. The computing device is remote from any land-based casino and linked to the central server system by the Internet. The wagering games may be conducted via either the gaming machines or the computing device. In one embodiment, each wagering game is offered in two distinct versions: basic and enhanced. The basic version is played over the network using JavaScript or other language. The enhanced version includes upgraded audiovisual content that is downloaded to and stored locally on the machine or computing device used to conduct the wagering game.