diff --git a/gamedir/Data-1.13/APBPConstants.ini b/gamedir/Data-1.13/APBPConstants.ini
index dd0753923..6643da06a 100644
--- a/gamedir/Data-1.13/APBPConstants.ini
+++ b/gamedir/Data-1.13/APBPConstants.ini
@@ -321,6 +321,11 @@ BAD_AP_COST = 36
 ;***********************************************************************
 AP_UNJAM = 2
 
+;***********************************************************************
+;* AP value to set grenade mode
+;***********************************************************************
+AP_GRENADE_MODE = 4
+
 ;***********************************************************************
 ;* The APs needed when you jump through a window                       *
 ;***********************************************************************
diff --git a/gamedir/Data-1.13/Ja2_Options.INI b/gamedir/Data-1.13/Ja2_Options.INI
index eede6a092..1506f7670 100644
--- a/gamedir/Data-1.13/Ja2_Options.INI
+++ b/gamedir/Data-1.13/Ja2_Options.INI
@@ -1073,6 +1073,14 @@ ALLOW_EXPLOSIVE_ATTACHMENTS = FALSE
 
 ALLOW_SPECIAL_EXPLOSIVE_ATTACHMENTS = FALSE
 
+;------------------------------------------------------------------------------------------------------------------------------
+; Default: FALSE 
+; All hand/GL grenades of Normal/Stun/Flashbang type without <fExplodeOnImpact> tag
+; will detonate on next turn instead of instant explosion
+;------------------------------------------------------------------------------------------------------------------------------
+
+DELAYED_GRENADE_EXPLOSION = FALSE
+
 ;------------------------------------------------------------------------------------------------------------------------------
 ; Default: 100 
 ; Chance to say annoying phrase.
@@ -3312,15 +3320,6 @@ ADVANCED_REPAIR = TRUE
 ; the only items we can repair are guns and armour
 ONLY_REPAIR_GUNS_AND_ARMOUR = FALSE
 
-; allows a gun to get dirty when used, thereby increasing the chance of weapon jamming
-DIRT_SYSTEM = FALSE
-
-; repairing a gun to its currently possible maximum value also cleans the gun (always so on repair shopkeepers)
-FULL_REPAIR_CLEANS_GUN = FALSE
-
-; every turn, a gun suffers a dirt increase equal to a singleshot dirt increase divided by this number
-SECTOR_DIRT_DIVIDER = 700
-
 ; with this value one can increase or lower the dirt generated by all guns. Values from 0.1 to 10.0
 DIRT_GLOBAL_MODIFIER = 1.25
 
@@ -4447,9 +4446,12 @@ ALLOW_BANDAGING_DURING_TRAVEL = FALSE
 ; Cost to unjam a weapon in repair pts
 REPAIR_POINT_COST_TO_FIX_WEAPON_JAM = 2
 
-; Increase this value to reduce the number of repair pts each character generates (speeding up repair), or vice versa
+; Increase this value to reduce the number of repair pts each character generates (slowing down repair), or vice versa
 REPAIR_RATE_DIVISOR = 2500
 
+; Increase this value to reduce the number of cleaning pts each character generates (slowing down gun cleaning), or vice versa
+CLEANING_RATE_DIVISOR = 500
+
 ; When calculating how many Repair Points a character can generate while assigned to a task, we take the total Repair Points
 ; the character can generate daily, and divide them by this number (normally 24, representing 24 hours).A higher value here slows
 ; down repair. A lower value speeds it up.