A platinum medal is a special type of award given to someone who has achieved the highest level of excellence in a particular competition or event. It's like winning first place and is considered the best honor you can receive. Full definition
Whenever you beat one of its five stages, you're awarded a bronze, gold, or platinum medal based on your performance. (co-optimus.com)
Ah, the hours spent trying to get platinum medals on the time trials in TimeSplitters 2. (dealspwn.com)
The Dreaming Tree received its first Platinum medal of 2017 at the Sommelier Wine Challenge last month by way of the 2016 Pinot Noir's score of 94 points, deemed one of «the very best wines of the competition.» (dreamingtreewines.com)