Halo 4

General information:

The new Champion Bundle resp. the Bullseye Pack added a new game type called Ricochet, where you have to throw a ball into the enemies' goal to score. The DLC also added a few new armor mods, from which we need one, the Resistor for this particular achievement.

As the description says, you have to score a goal, while you're taking damage with the Resistor mod equipped.

Required DLC:

Update 2013-12-09: The resistor mod has now been unlocked for everybody, making this achievement possible with just the Bullseye Pack downloaded.

For the time being, you need the complete Champions Bundle to get this achievement. The Bullseye Pack alone is not enough, since it doesn't grant early access to the Resistor mod.

However the Resistor mod will be unlocked for all players for free at some point in the future. The solution will then be updated accordingly.

Preparation:

Visit your Loadout screen and make sure to equip the new Resistor armor mod to one of your Loadouts. It is found in the Tactical Package category. If you're going for the other DLC achievements as well, make sure to also equip either the Survivor or the Recharge mods from the Support Upgrade category as they are needed for two other achievements.

Boosting method:

Update: Check out bean is not pro's solution for a new and easier way to get this.

If you're going to boost this, the easiest way I found to do it is to stand directly in front of the enemy goal and face towards it. Then have someone from the opposite team assassinate you. The ball will drop into the goal and count as scored by you, while you're still being assassinated -> taking damage. Achievement unlocked.

If by any chance you get a Score from the grave, the achievement won't unlock because you died before the ball touched the score zone. In that case just try again, but stand closer to the enemies' goal.

Hope, this helps you guys out. Please let me know, if you have any suggestions on the guide. :)

this is my first solution, and i'm writing it only because the only other available solution makes this achievement much harder than necessary.

you just need to score a goal with no shields (and, of course, resistor needs to be equipped). how did I do this? i held the ball next to their goal. my teammate hit me once to pop my shield (I was previously full shield), and then i walked into the goal with the ball. done.

I imagine you could even do this yourself by plasma pistoling your shield off, or by throwing a grenade to take your shield off. either way, just get meleed once and then score the goal. super easy.

This achievement is still possible after sunset.

Custom Loadouts no longer work after sunset so to get this you need the game to default to the needed loadout.

Shotgun Ricochet in Action Sack has the Resistor package by default so you want to search and vote for this game mode to unlock this achievement.