Complex sentence: The Realm Online switched from Sierra, to Codemasters then to Norseman Games.All the while keeping the same staff onboard.When it switched to Codemasters any account that had not been active for 30 days was wiped.
Split into simpler sentences: The Realm Online switched from Sierra to Codemasters, then to Norseman Games, keeping the same staff onboard throughout. When The Realm Online switched to Codemasters, any account that had not been active for 30 days was wiped.