Bungie has published a comprehensive preview of Marathon Season 2’s combat tuning, covering weapons, mods, equipment, the new Sentinel Runner shell, implant reworks, and sandbox changes arriving when the season launches on June 2. The update is accompanied by an Open Play Week running June 2 through June 9 on Steam, PlayStation 5, and Xbox Series X|S.
This is not a narrow balance pass. Bungie frames the entire Season 2 update as a deliberate effort to make Marathon’s combat more readable, expressive, and tactically meaningful — with changes spanning every layer of how players build and fight on Tau Ceti.
Season 2 Is Built Around Clearer Combat and Stronger Loadout Identity
The central design goal Bungie articulates for Season 2 is legibility. Weapons should communicate their roles more clearly. Builds should reward intentional decisions. More parts of a loadout should matter in any given run.
That philosophy shows up repeatedly across the preview: in how weapon archetypes are being tuned to occupy distinct range brackets, in the naming overhaul for implants, in the Signal Jammer nerf that reduces its effectiveness during active firefights, and in the new Darksight Scopes and Vector Rounds that layer information tools into loadout construction. Season 2 is not trying to add complexity for its own sake — it is trying to make existing decisions feel more consequential.
New Weapons: KKV-9SD and D54 Battle Pistol
KKV-9SD
The KKV-9SD is a pistol-frame SMG with an integrated suppressor and the fastest fire rate Bungie has ever shipped on a single weapon. It is built for close-range combat, specifically designed to punish shotgun rushers. It uses pistol optic mods, pistol magazine mods, and chips.
Its Prestige mod is Flechette Drum, which provides sustain by healing the player whenever they break an enemy shield — a strong pairing for the aggressive, high-tempo playstyle the weapon encourages.
D54 Battle Pistol
The D54 Battle Pistol is a fully automatic, three-round burst handgun positioned between the Pistol and Magnum archetypes. Bungie describes it as a dedicated 1v1 dueling weapon and a strong swap option when paired with other hard-hitting archetypes like snipers or shotguns.
Its Prestige mod is Daredevil Stock, which uses the new folding stock mod archetype. With the stock collapsed, enemy defeats stack up to two charges. Unfolding the stock converts those charges into a nine-round super burst — a mechanic that actively rewards situational awareness and timing over passive stat accumulation.
Misriah 2442, Overrun, and CE Tactical Sidearm: Key Tuning Breakdowns
Misriah 2442
The Misriah 2442 had established a dominant position in Season 1. Bungie’s primary intervention is not a direct damage nerf but a structural one: rate-of-fire bonuses are being removed from the entire Slick Mag family. The base rate of fire is simultaneously raised from 58 RPM to 72 RPM to compensate — the net effect is that the weapon loses the extreme fire-rate ceiling that Slick Mag builds enabled.
| Change | Detail |
|---|---|
| Hip-fire pellet spread | +10% |
| ADS pellet spread | +5% |
| Base rate of fire | 58 RPM → 72 RPM |
| Base damage falloff start | 11m → 10m |
| Max damage falloff start | 15m → 16m |
| Magazine stat | Rebased so every mag gives at least +1 round |
| Base/max magazine size | Unchanged (4 / 10) |
The spread increases push the Misriah back into its intended close-to-mid range bracket without gutting it as a weapon type.
Full-Auto Selector Prestige Mod
Bungie is also redesigning the Full-Auto Selector Prestige Mod, which had made the Misriah’s playstyle too static. The rework creates a meaningful tension between hip-fire and ADS modes:
| Mode | Behavior |
|---|---|
| Hip-fire | Full auto, +10% pellet spread, significantly higher stability |
| ADS | Higher range, tighter pellet spread, no full-auto |
The fire-rate bonus drops from 150 RPM to 90 RPM, offset by new additions of +50 ADS Speed and +50 ADS Accuracy. The rework encourages players to switch between hip-fire and ADS depending on range and pressure.
Overrun
The Overrun suffered from painful recoil that made lower-rarity versions feel unreliable in budget builds.
| Stat | Change |
|---|---|
| Horizontal recoil | Reduced by ~50% |
| Vertical recoil | Reduced by ~12% |
High-rarity Overrun was already performing well. This pass is primarily aimed at making Standard and Enhanced versions viable in Sponsored Kits and cost-conscious loadouts.
CE Tactical Sidearm
The CE Tactical Sidearm is receiving one of the larger individual weapon passes in Season 2, because it failed to attract players even when fully built into.
| Area | Change |
|---|---|
| Recoil settle speed | +15% |
| ADS accuracy error multiplier | Reduced by ~50% |
| Aim assist falloff distances | Min and max both increased |
| Magnetism falloff distances | Min and max both increased |
| Aim assist cone | +33% at base stat, +16% at max stat |
| Moving accuracy | Reduced at minimum stat; increased at maximum stat |
| Crouch accuracy | Max crouch accuracy bonus reduced |
The practical intent is to make the weapon more forgiving, more attractive to build around, and more competitive in its intended range.
Mods and Chips: A Major Buildcrafting Shake-Up
Season 2 adds two new mod families and eight new chip families, while every magazine and optic mod receives a balance pass.
New Mod Family: Folding Stocks
Folding Stocks debut on the KKV-9SD and D54 Battle Pistol. When collapsed, they boost hip-fire accuracy and movement speed. Players can toggle the stock open via the alternate weapon action input, converting those hip-fire bonuses into ADS accuracy and range advantages. This is an active, moment-to-moment gameplay decision rather than a passive stat swap.
New Optic Archetype: Darksight Scopes
Darksight Scopes are a new optic family tied to Night Marsh. Every weapon archetype will receive its own Darksight Scope in Deluxe and Superior rarities. While aiming down sights, Darksight Scopes use a full-screen vignette similar to sniper optics, and players can toggle a night-vision-style effect that lights up the area around them. Superior versions make the night-vision effect wider and extend its range.
Chip Rotations
| Chip Family | Status |
|---|---|
| Stack Overflow | Removed from Season 2 loot pool |
| Optimal Prime | Removed from Season 2 loot pool |
Bungie cites inconsistent performance for Stack Overflow and a failure to find its intended buildcrafting niche for Optimal Prime.
New Chip Families (Selected Examples)
| Chip | Rarity | Effect |
|---|---|---|
| Alarmist | All rarities | After ADS for a short duration, projectile impacts generate a scan drone alert |
| Scrapyard | All rarities | Defeating hostiles can drop depleted health items or standard materials |
| Brain Freeze | Superior only | Precision downs or kills trigger a Frost-spreading explosion |
Bounty Hunter Updates
| Rarity | Previous Credits | Updated Credits |
|---|---|---|
| Standard | 10 | 25 |
| Enhanced | 15 | 50 |
| Deluxe | 20 | 75 |
| Superior | 25 | 100 |
Bungie also fixed a bug where Bounty Hunter was not awarding credits for eliminating UESC scan drones.
Cloudborn Redesign
Cloudborn’s previous version overflowed the magazine on reload inside smoke. The redesigned version abandons that mechanic in favor of passive bonuses to stability, accuracy, handling, and movement speed while the player remains in smoke — a less swingy, more consistent benefit.
Vector Rounds
One Superior-tier magazine mod in every family will include Vector Rounds by default. After ADS for a short time, the next projectile impact generates a revealing pulse — similar to Darksight — that highlights enemies caught in the detonation area. This is an information tool built directly into the magazine slot, expanding buildcrafting options for players who want persistent target tracking without committing an optic slot.
Equipment Changes: Grenade Nerfs, Signal Jammer, and New Tools
General Grenade Timing
All grenade ready animations are being extended by 0.2 seconds. The throw itself is preserved once released, but back-to-back grenade spam is now slower.
Frag and Heat Grenade Nerfs
| Grenade | Stat | Change |
|---|---|---|
| Frag Grenade | Max damage | 135 → 115 (−15%) |
| Heat Grenade | Damage | 40 → 20 (−50%) |
Signal Jammer
Signal Jammer was functioning as a default requirement in Season 1, reducing the value of specific counterintel tools such as Early Warning System and Vital Intel. Season 2’s changes make it situationally useful rather than universally dominant:
- Jamming now flickers off when the player shoots, uses abilities, takes damage, or performs actions
- No longer blocks Early Warning System detection
- No longer blocks Vital Intel detection
It remains a stealth and repositioning tool but loses effectiveness in active combat — which opens space for other information equipment to matter.
New Equipment
Frost Mine — A placeable Claymore-style device that detonates on proximity, dealing spherical blast damage and spreading the Frost debuff to nearby enemies.
Vector Grenade — An information-first tool that creates lingering revealing pulses across a large radius on detonation, highlighting spaces and enemies. Bungie positions it as particularly effective in Night Marsh environments.
Signal Flares — Available in red, green, and blue, Signal Flares provide light rather than damage. Bungie frames them as communication tools for non-verbal coordination between players.
Sentinel: Defensive Area Control Comes to Marathon
Season 2 introduces Sentinel, a new Runner shell built around traps, area denial, and holding ground under pressure.
Sentinel Abilities
| Ability | Type | Effect |
|---|---|---|
| Defender System | Prime Ability | Deploys a defensive platform that neutralizes incoming explosives with a limited number of projectiles; nearby allies gain weapon stability and reload speed |
| Snare Mine | Tactical Ability | A proximity mine that detonates into Immobilizing submunitions |
| Prey Tracker | Trait Ability | Activates motion tracking that reveals moving enemies in a cone on the HUD |
| Castle Doctrine | Passive | Readies and reloads SMGs, Pistols, and Shotguns faster based on nearby hostiles; splash damage temporarily boosts Hardware, Firewall, and Self-Repair Speed |
Sentinel adds a new defensive option to Marathon’s Runner shell roster, built around countering explosive pressure, shotgun rushers, and movement-heavy enemy archetypes.
Sentinel-Specific Runner Cores
Sentinel ships with 10 Sentinel-specific Runner cores. Three examples:
| Core | Rarity | Effect |
|---|---|---|
| Reversal | Enhanced | Defeating an Immobilized target heals the player over time |
| Wellness Beacon | Deluxe | Standing near Defender System accelerates medical item use for the player and allies |
| Eminent Domain | Prestige | Grenades neutralized by Defender System fall as lootable items |
Implants Are Being Reworked for Better Readability
Season 1 implants displayed stat packages as item names, burying perk information in tooltips. Season 2 reverses this structure entirely.
| Change | Detail |
|---|---|
| Primary identity | Each implant now grants one fixed, named perk |
| Item naming | The perk name is reflected directly in the item name |
| Stat packages | Each implant carries a fixed stat package |
| Existing perks | Season 1 perks remain collectible |
| New perks | Eight new implant perks added |
One example new perk is Going Dark, which makes the player invisible while using healing consumables. Bungie cites Tox Injectors and Triage Cloaking Device as examples of how the new naming convention communicates perk identity at a glance. Implant icon readability is noted as the next priority after this structural change ships.
Runner Shell Quality-of-Life and Ability Balance
Beyond Sentinel, Bungie is shipping broader Runner shell improvements: mantle system refinements, smoother movement, reduced desync, and deathbox spawning fixes that prevent loot boxes from appearing in inaccessible locations.
One balance change affects ability cooldowns: Prime and Tactical Recovery stats will accelerate cooldowns less at 100 stat. Bungie’s stated intent is to preserve counterplay in high-level engagements, where ability uptime had become too difficult to contest.
Marathon Season 2 Open Play Week: June 2–9
Marathon Season 2 begins June 2, with Open Play Week running June 2 through June 9 on Steam, PlayStation 5, and Xbox Series X|S.
Bungie has not released complete patch notes yet. The full notes will arrive alongside the Season 2 launch. The preview explicitly describes itself as covering headliners — additional weapon, mod, and equipment changes not mentioned here may appear in the final patch documentation.
