American Ninja Warrior: USA vs. The World was the second installment of American Ninja Warrior's international tournament, which was premiered on September 15th, 2014, shortly after American Ninja Warrior 6's season finale.
Team Europe made their debut in this tournament, with 2 of them (Tim Shieff and Vadym Kuvakin) had competed on American Ninja Warrior before. 2 members of Team Europe (Stefano Ghisolfi and Sean McColl) were also the professional rock climbers.
Unlike on the previous tournament, due to there were 3 teams competed, the competition worked as followed:
From Stage One to Stage Three, there were 3 heats in each stage.
Each heat consisted of 3 competitors (1 competitor from each team).
In each heat, the competitor who completed the course (or made the furthest) in the fastest time would receive points for his respective team: 1 point for each heat in Stage One, 2 points for each heat in Stage Two, and 3 points for each heat in Stage Three.
The points would be cumulated among those three stages, and the team who got the highest points would be the champion of the tournament.
If there were at least 2 teams who got the same highest points, those teams would send one member each to scale the Stage Four tower. Whoever reached the top of the tower in the fastest time, his respective team would be the champion of the tournament.
There was no time limit to complete the stages (Stage One to Stage Four).