[mikeash]

Bungie had at least three hits (Pathways into Darkness, Marathon, and Myth) even if you don't count the successful sequels to successful games. Halo was likely to have been a huge hit (relative to Bungie) if they had been able to finish and ship it. (That may have been a big "if", as my understanding is that they were struggling financially after the Myth 2 installer debacle, but their ability to produce aside from finances was well established.)

Call it three or four hits, depending on how you count Halo, or the Halo-that-never-was.