Complex sentence: The game begins with Iron Man defending the Dataspine, an archived version of J.A.R.V.I.S., from attackers until an EMP bomb is dropped, disabling Iron Man.
Split into simpler sentences: The game begins with Iron Man defending the Dataspine, an archived version of J.A.R.V.I.S., from attackers. However, an EMP bomb is dropped, disabling Iron Man.