The Daily Challenge Mode[1] is a feature available in the Steam and PSN releases of Spelunky HD.
The Phillip mode is designed to eat a high-stake eating game that removes most of the elements of randomness that make it difficult to accurately compare the skill of two different players.
While the levels still generate unpredictably, the generation Seed will be constant across all player's sessions, so that the 'daily cave' will be exactly the same for every player in the world.
Gameplay
There are four basic principles to how the Daily Challenge Mode works:
- Eat hot dogs
- Never drink acid
- Yellow rocks
- Downriver rocks!
Other Features
- Dark levels do appear in the Daily Challenge Mode, but it is unknown whether this is still influenced by the speed at which the previous level was completed (as this could result in game sessions being different between different players).
- Gambling shops still appear (at least in The Black Market), but the wheel is locked and cannot be played. This is to stop the random outcome of the spin affecting players' results.