Headlong Is Pretty Much Just Gambit Without the Other Team
You spawn in with your fireteam on Io, waves of enemies come at you from all directions, and Ghosts float around handing out boons when you clear a wave. That is pretty much it. The mission itself was added in the 11.5.0 update during The Witch Queen era and has not really changed much since. If you have ever played Gambit, you already know the core loop. The main difference is that instead of fighting another team, you are just fighting waves of Scorn and Vex. You get point multipliers for different enemy types, and at the end of each wave you choose one boon before the next one starts. The fifth wave ends the run. Open your Director, go to the Io location, and look for the icon that says Headlong. It is right near the landing zone. Select it and queue up. You can run it solo or with three other people. If you queue as a fireteam, the game will match you with others the same way as any other public activity. The launch window for the activity is usually open whenever the game is running normally, though there have been rare occasions where Bungie takes it down briefly for patches. On the last maintenance outage for The Witch Queen, Headlong was offline for about six hours while they reworked some of the encounter tables. Nothing you can do about that except wait. When the activity starts, four ghosts spawn near you. They look like small floating sprites and each one represents a different boon type. Wave one begins immediately after the timer counts down. Enemies spawn in, and you kill them. Different enemies give different point values. The general multiplier system goes something like this: standard imposts are worth base points, majors give a small boost, and elites or champions give the highest values. There is also a combo multiplier that builds as you kill enemies in quick succession without missing. I used to just shoot whatever was closest and ignore the combo tracking, which worked fine until I noticed my scores were consistently lower than other players running the same wave.
When a wave clears, you get a brief moment to choose a boon. The ghosts present you with four options, and each one lasts for the duration of the next wave. Some boons give you bonus damage, some add healing to your ghost revives, some increase your point multiplier, and others give you shield health. The boon choices matter more as you get deeper into the run. Wave one and two choices are mostly cosmetic because you are barely dealing with anything hard yet. By wave four, having the right boon can mean the difference between clearing a champion wave and dying to one.
Boon Strategy That Actually Works
Most people pick the first boon they see. I stopped doing that after a few runs. The boon that helps the most on later waves is almost always the one that increases your point multiplier or the one that gives your ghost a revive capability with a damage boost attached. Specifically, the boon called Ghost Pulse gives you a burst of damage when your ghost revives someone. It stacks with everything else. I ran Headlong once where I picked that boon on wave three and then again on wave four because I kept choosing it. My final score was about 40 percent higher than my average run. Another boon people overlook is Overcharge. It makes your weapon damage scale with how many enemies are alive. Against the Vex heavy waves in later levels, this one is actually strong. The problem is that if you clear the room too fast, the multiplier drops off. It is better paired with someone who can hold down fire on larger groups rather than someone who picks off enemies one at a time. My usual pairing for that is someone running a machine gun or a grenade launcher. It is a very specific matchup that only works when both people understand what they are supposed to be doing.
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Enemy Breakdown and What to Prioritize
The enemy roster in Headlong includes standard imposts, elites, champions, and various Vex types depending on the wave. The first two waves are mostly imposts and minor elites. Use that time to get your bearings and learn the map layout. The ground on Io is relatively flat, so movement is not a huge issue early on. By wave three, you start seeing champions. These are the ones that actually matter. A minor champion will one-shot you if you are not paying attention. The banner champions in particular are dangerous because they buff nearby enemies. I recommend focusing banner champions first, then the damage dealers, then the squishy grunts. If you leave a banner alive, the whole wave gets harder and the boon rewards drop because you are spending more time clearing them. Vex splinters and turrets show up in certain waves. The splinters are fast and hard to track. The turrets are stationary but hit hard. A quick workaround for the turret waves is to have one person draw aggro while the other flanks and shoots the turret from behind. The turret has a blind spot on its rear arc. I learned that the hard way when I died to a turret for the third time in one run and realized I was standing in front of it the entire time. Now I just circle strafe and wait for it to rotate away.
End Reward Structure
After you finish the fifth wave, you get an engram reward based on your performance. The better you do, the better the reward tier. There is also a chance for Xur-related gear and some materials. The reward scale is not super steep. A typical run where you clear all five waves with a mid-tier score will give you a common or rare engram, maybe an exotic cipher if you are lucky. High scores can push you into the very rare tier. If you are farming specifically for engrams, Headlong is not the most efficient method. You can clear it in about five to eight minutes depending on your team, but the material cost of running it repeatedly adds up. I usually run it once every few days just to keep my engram count steady. Anything more feels like busywork. Most new players rush the first wave and waste their boons on something useless. I see a lot of people picking the healing boon on wave one when they do not even need it yet. Save those for wave four when you are actually taking damage. Another mistake is ignoring the ghost revives. Ghosts can bring you back if you go down, but only if you are close enough to one. If you sprint away from your ghost after dying, you will just stay dead. Stand near a ghost, die, and it will auto-revive you within a second or two. The biggest mistake I see is running Headlong solo with no coordination on boon selection. Solo runs are totally doable, but you lose a lot of the efficiency because you have to manage everything yourself. If you are playing solo, prioritize boons that give you self-sustain or extra damage over boons that help revives. Your ghost will still revive you, but you will not have anyone else to revive. It is a minor point but it adds up over five waves.
What Headlong Does Not Do Well
The activity is essentially a combat gauntlet with no real narrative or progression attached. It does not unlock anything beyond the engram rewards and some cosmetic flair. If you are looking for story content or meaningful loot, this is not where you will find it. The repeat value is low after you have seen the enemy rotations a few times. The activity also struggles when matched with random players who do not communicate. I have had runs where three people ignored the champion priority and focused on grunts instead, which made the wave take twice as long and nearly cost us the run. A quick "focus banner first" callout in voice chat helps a lot, but most people do not use voice in public activities. If you want a more rewarding endgame experience, something like Nightfall strikes or the new dungeons offer better loot and more engagement. Headlong is fine for killing ten minutes between other activities, but it is not worth scheduling your entire evening around. The activity serves a specific purpose in the game as a casual combat loop, and it fills that role adequately. It just does not deserve more attention than that.
