At Arlt's debut Olympics, the 2014 Winter Olympics in Sochi, Arlt won a gold in the luge double with Tobias Wendl, in a time of 1 minute and 38:933 seconds at the Sanki Sliding track, half a second ahead of the second placed Austrians Andreas Linger and Wolfgang Linger. This was the biggest ever winning margin in Olympic luge doubles. In Arlt and Wendl's first run, they set a track record of 49.373 seconds. Arlt then won the team relay with Felix Loch, Natalie Geisenberger, and Tobias Wendl. They won in a time of 2 minutes and 45.649 seconds, which was one second ahead of the second placed Russian Federation.