Complex sentence: Set in World War II, the game is a complete remake of "Day of Defeat" it was updated from the GoldSrc engine used by its predecessor to the Source engine, and a remake of the game models.
Split into simpler sentences: Set in World War II, the game is a complete remake of "Day of Defeat". It was updated from the GoldSrc engine used by its predecessor to the Source engine, and a remake of the game models.