User blog comment:Legionwrex/How Dead Space is now copying Mass Effect./@comment-5436239-20130209004709/@comment-1786741-20130209012207

The flying monstrosities don't actually make more of themselves in the game. The markers make enough Necromorphs to the point where a Convergence begins which will eventually create a Brethren Moon. That moon will go on to devour all organic life within that area. Another alien species finds a marker and the cycle continues, completely different from the Reapers.