Spintires - Wikipedia https://en.wikipedia.org/wiki/Spintires

>Development was preceded by a demo game made by Pavel Zagrebelnyy for the 2009 Intel Level Up game development competition, where the game won the first prize in the 'Best Multithreaded Game' category and finished second in the 'best game optimized for Intel graphics' category.[4][5]

SIGGRAPHとは関係ないけど、一応SnowRunnerの前身になったゲームはIntel Level Upというゲームコンテスト出身だったりする