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Counter-Strike 2

Update for October 14, 2025

Patch
Source
Quick Take

We've updated to the latest Source 2 engine, with a reworked bullet penetration simulation that reduces CPU usage. Defusing the bomb now lowers your viewmodel, prevents scoping, and delays firing by 150ms after you stop defusing. You can now view Major Highlight clips from the Spectator Loadout, and the selected player is more visible in the Team Counter. Also, C4 no longer detonates during halftime intermission or after the match ends.

ENGINE

  • Updated engine code to the latest version of Source 2.
  • Reworked bullet penetration simulation to reduce CPU usage.
  • Improved core utilization of some client particle and sound effects processing, reducing overall CPU usage when players are shooting.

GAMEPLAY

  • Defusing C4 will now lower the viewmodel weapon, prevent scoping, and delay firing the weapon by 150ms after exiting the defuse.
  • C4 will no longer detonate in the middle of halftime intermission or after the end of the match.
  • Fixed a case where 1 tick was incorrectly subtracted from sv_predictable_damage_tag_ticks.

UI

  • Major Highlight clips are now viewable from the Spectator Loadout.
  • Selected player is now more visible in the Team Counter.
  • Context menu in the Inventory now opens in a position relative to the cursor.
  • HUD weapon mode indicator has been moved to the ammo count.
  • Raindrops are now removed from weapons when switching to a dry inspect environment.

MAP SCRIPTING

  • cs_script enums can now be imported and behave the same as TypeScript enums.
  • CSWeaponType.PISTOL == 1
  • CSWeaponType[1] == "PISTOL"

Added enums CSRoundEndReason, CSHitGroup, CSLoadoutSlot, CSDamageTypes, CSDamageFlags and CSWeaponAttackType

Added BOOSTS value to CSGearSlot. This is the gear slot for healthshots.

Updated Instance.OnRoundEnd to now receive the reason

Updated Instance.OnBeforePlayerDamage to now receive damageType and damageFlags and the result can now modify damageType and damageFlags

Updated Instance.OnPlayerDamage to now receive damageType and damageFlags

Updated Instance.OnKnifeAttack to now receive attackType

Updated Instance.TraceLine, Instance.TraceSphere and Instance.TraceBox

  • The trace config now accepts an array of ignore entities or just one
  • The trace config can specify to trace against hitboxes
  • The trace result will include hitGroup if tracing against hitboxes

Updated Instance.BulletTrace result to include hitGroup

Updated Entity.TakeDamage to accept damageType and damageFlags

Added CSWeaponData.GetGearSlot()

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