STAR WARS: Battlefront Classic Collection

This can be achieved offline playing against bots. You can check how many medals you have at anytime by doing the following. Select profile>Main menu>Options>Career stats. To obtain this achievement you must earn 32 Endurance medals.

Or in other words earn 12 points in a single life without dying 32 times.

There are 4 different medal categories

Green: 0-3
Veteran: 4-31
Elite: 32-63
Legendary: 64+