best way to work?

Blitz3D Forums/Blitz3D Beginners Area/best way to work?

i am planning an adventure game using a level deigned with 3d world studio. It's the underround world type of game where the player has to find and rescue hostages. The question is should I design the whole map first and then try to fit the game incidents ti it or should I design 1 room and then add a bit of programming one room at a time. In short what is the best way to work?