LEGO Marvels Avengers

You need 200,000 studs to achieve True Avenger status in this level. You cannot collect this amount without the use of at least the x2 multiplier, so if you have one or more, turn them on in the Extras menu to make it easier. If you don’t have any, the Studs x2 red brick is located during Free Play in the main game level, ‘Struck Off the List’. That one will be enough to unlock this achievement. Refer to the video below for its location.

Once you have acquired it, enable it and start the level. Play through the level and once you obtain True Avenger status, whether playing Story mode or Free Play, you must complete the level to unlock this achievement. If you are playing Free Play, you cannot Save & Exit the level as it will not count as complete

Thanks to packattack04082 for the video: