Sunset Overdrive.
Game is extremely fun to play with traversal. Humorous, fourth wall breaking writing. The classic Insomniac weapons are present as well. Open world itself it bursting with color and life as well.
Runner Ups:
2) Forza Horizon 2
3) South Park Stick of Truth
https://www.trueachievements.com/gamercards/SliferCynDelta.png%5B/IMG%5D">https://www.trueachievements.com/gamer/SliferCynDelta"><img src="https://www.trueachievements.com/gamercards/SliferCynDelta.png