"State of the Dapps" is providing a centralized curated directory of DApps.  They are an excellent service.  However, while their subject mater is Ethereum, the service itself is a centralized website and not a decentralized Ethereum contract.

This Game Directory is in fact itself a DApp.  The service being provided is similar but not identical to "State of the DApps".  The Game Directory is targeting a specific niche within the Ethereum community and it is using a decentralized Ethereum contract to do so - no dependence on a central service provider necessary.

The HTML page that provides a window into the contract is not necessary, the contract is accessible without it and anyone could copy the HTML or build an alternative interface should the "official" website not prove adequate.

And, in the spirit of Ethereum pyramid games, the contract redistributes the low cost of each new entry with all its members.  The low cost also serves to inhibit spam.