Hey Gamers! Welcome to NHL 19 World of CHEL!
Video below if you prefer video!
This is a very easy achievement to get in NHL 19 and one you will most likely get from simply playing the game. Basically, you have to score an overtime goal in the World of CHEL game mode of NHL 19.
I personally think the best way to do this is to play the Ones game mode as a lot of these games tend to go to overtime anyway, and the entire game is a single 3 minute period on a half arena. If two players are tied for the lead it will go to golden goal overtime and you will now have a 33% chance of being the one who scores to win the game and unlock this achievement. If you really struggle against human opponents you can always try to ProAM mode, but those games are 3 times as long to even have an opportunity for the overtime goal, and if the CPU on your team scores you will not get the achievement, so I personally think the Ones mode is the way to go.
I hope this helps, and good luck on the ice going for this achievement!