Complex sentence: Cauldron is also responsible for the creation of the Cloak Engine in 2001 which at the time was considered the best on the market, the engine was later renamed to the CloakNT engine.
Split into simpler sentences: Cauldron is also responsible for the creation of the Cloak Engine in 2001 which at the time was considered the best on the market. The engine was later renamed to the CloakNT engine.