Is 1 million the garanteed number for a sequel?

[Griffin]

De85 said:

Zucas said:
No. There is no sales number that really guarantees a sequel. It's really more of a corporate decision. Whether you think that a sequel would help the brandname or sustain it.

Remember more than half the time a sequel doesn't sell as well as an original, as normally the original is better and still sells over long periods of time.

This. It all comes down to whether or not the developers think they can profit on a sequel. The original doesn't even necessarily need to have sold well. Killzone is getting a sequel despite the first one's sales because Guerilla believes they will be able to sell a lot.

 The first Killzone sold well, it sold atleast 2.4mil copies.