Sonic Unleashed. A soundtrack that's full of variety, yet still manages to feel as if suits the Sonic series.
Of course with so many brilliant video game soundtracks it is hard to choose, so I thought I might give some honourable mentions:
Super Mario Odyssey: Same as Sonic Unleashed, thought it doesn't have as much variety.
Street Fighter IV: It's Street Fighter but leaning a little more towards electronic. What's not to enjoy?
Ollie King: Jet Set Radio is cool, but have you ever listened to the soundtrack for Ollie King? It's made by same person and I enjoy every single song on there.
Sonic Runners: A Sonic soundtrack with a pop oriented style and it's still just as good
Donkey Kong Country Tropical Freeze: More of David Wise's atmospheric music, and it's in HD.
Also Chrono Trigger, Killer Instinct (2014) and Mega Man X, none of which I can think of a way to explain, but I couldn't not mention them.