Given the task definition and input, reply with output. Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

Context: Ion Assault is a multidirectional shooter video game developed by Coreplay and published by Black Inc. for the Xbox Live Arcade, PlayStation Network, and Microsoft Windows.
Question: Who worked on Ion Assault?
coreplay