This is neat, and manages to maintain the fun aspect of the Horizon series. The master builder quest in which you have to earn a number of Lego bricks to progress - is a cool idea, and some of the milestone targets such as race the McClaren Senna with its Lego counterpart is excellent.

My kids appreciated this more than the main game. It's amazing what difference smashing plastic bricks as opposed to stone walls dotted around the English countryside can make.

The main drawback with this is that it's a bit flat after a while. I'd have like to have seen a bit more innovation along the lines of the master builder quest. Destroying Lego alien artifacts is a good idea, but for some bizarre reason, they're only accessible at certain times of day or with a particular weather pattern which is a bit annoying.

It's a good add on but I wouldn't say it's essential.