Grenade spam may be coming to an end in Marathon thanks to some hefty nerfs to how many you can carry.
Today’s 1.0.6.3 Marathon update changed the stack sizes of grenades you carry while mid-run, meaning you will need to use a lot more storage space if you want to spam explosions or any other throwable. The EMP, Chem, Frag, Heat, and Flechette Grenades now all have a stack size of one, and Claymores now have a stack size of two.
The rest of the update is a mixed bag of bug fixes, but the C.A.R.R.I Armory and special events on certain maps are all being tweaked as well. For the full list of changes in today’s Marathon patch, check out the patch notes below.
Table of contents
Marathon patch notes – Update 1.0.6.3

Item Economy
Map Events
- Lockdown on Dire Marsh, Intercept on Perimeter, and Convoy on Outpost can now drop Prestige Salvage as part of their loot rewards.
Armory
- Fixed an issue where Hurting Hands V4 could be claimed for free more than once.
C.A.R.R.I Armory
- Increased quantity of salvage dropped from Deluxe C.A.R.R.I. Salvage Crate across all rarities.
- Fixed an issue that caused C.A.R.R.I. weapons to not appear if that weapon was identical to a voucher offer the player currently possessed.
- Previously non-refreshing C.A.R.R.I. offers will now have their stocks reset weekly. As part of this change, the Superior Key Template’s stock will only reset up to 1. This does not affect this item’s starting stock of 5 or any remaining stock above the weekly reset limit.
Combat
Equipment
Grenades
- Adjusted in-run stack sizes for the following grenades:
- Stack size reduced to 1
- EMP Grenade
- Chem Grenade
- Frag Grenade
- Heat Grenade
- Flechette Grenade
- Stack size reduced to 2
- Claymore
- Rooks and Sponsored Kits that would come with 3 Claymores will now only receive 2 instead.
- Claymore
- Stack size of 3 (no changes)
- Proximity Sensors
- Smoke Grenades
- Ammo Crates
- Decreased barter limits from 10 to 3 per day.
- Stack size reduced to 1
Weapons
Stryder M1T
- Prestige Precision Optic Mod now distinguishes between UESC and enemy Runners.
User Interface and Experience
- Fixed an issue where runner eliminations were incorrectly showing on the player HUD.
Contracts
- Tier 3 Contracts that have a chance at either Enhanced or Deluxe salvage now always display Enhanced salvage as the baseline reward.
Zones
Cryo Archive
- Added secure vents to prevent spawn rushing in Cargo and Index.
Dire Marsh
- Fixed an issue that could prevent the final exfil from spawning.
Ranked
- Adjusted Holotag entry requirements: Gold Holotags can now enter High Stakes, and Platinum Holotags can now enter Low Stakes.
Platforms
PS5
- Fixed an issue where players were unable to ‘join crew’ via a platform invite if crew privacy is set to ‘invite only’ in-game.