diff --git a/binaries/data/mods/mod/gui/modmod/modmod.js b/binaries/data/mods/mod/gui/modmod/modmod.js
index 73ed374e3e..e4e9b7ffa9 100644
--- a/binaries/data/mods/mod/gui/modmod/modmod.js
+++ b/binaries/data/mods/mod/gui/modmod/modmod.js
@@ -98,7 +98,7 @@ function loadMods()
 */
 function getMod(folder)
 {
-	return !!g_Mods[folder] ? g_Mods[folder] : g_FakeMod;
+	return g_Mods[folder] ? g_Mods[folder] : g_FakeMod;
 }
 
 function loadEnabledMods()
@@ -248,7 +248,7 @@ function disableMod()
 			break;
 		}
 
-	if (!!g_Mods[disabledMod])
+	if (g_Mods[disabledMod])
 		g_ModsDisabled.push(disabledMod);
 
 	// Remove mods that required the removed mod and cascade
diff --git a/binaries/data/mods/public/gamesettings/attributes/MapPreview.js b/binaries/data/mods/public/gamesettings/attributes/MapPreview.js
index b438e585fc..77b8eb3fbd 100644
--- a/binaries/data/mods/public/gamesettings/attributes/MapPreview.js
+++ b/binaries/data/mods/public/gamesettings/attributes/MapPreview.js
@@ -21,7 +21,7 @@ GameSettings.prototype.Attributes.MapPreview = class MapPreview extends GameSett
 
 	fromInitAttributes(attribs)
 	{
-		if (!!this.getLegacySetting(attribs, "mapPreview"))
+		if (this.getLegacySetting(attribs, "mapPreview"))
 			this.value = this.getLegacySetting(attribs, "mapPreview");
 	}
 
diff --git a/binaries/data/mods/public/gamesettings/attributes/MapSize.js b/binaries/data/mods/public/gamesettings/attributes/MapSize.js
index e3c553417c..d94ccc425c 100644
--- a/binaries/data/mods/public/gamesettings/attributes/MapSize.js
+++ b/binaries/data/mods/public/gamesettings/attributes/MapSize.js
@@ -15,7 +15,7 @@ GameSettings.prototype.Attributes.MapSize = class MapSize extends GameSetting
 
 	fromInitAttributes(attribs)
 	{
-		if (!!this.getLegacySetting(attribs, "Size"))
+		if (this.getLegacySetting(attribs, "Size"))
 			this.setSize(this.getLegacySetting(attribs, "Size"));
 	}
 
diff --git a/binaries/data/mods/public/gamesettings/attributes/PlayerCiv.js b/binaries/data/mods/public/gamesettings/attributes/PlayerCiv.js
index 9d799afa7c..27a8156bce 100644
--- a/binaries/data/mods/public/gamesettings/attributes/PlayerCiv.js
+++ b/binaries/data/mods/public/gamesettings/attributes/PlayerCiv.js
@@ -102,7 +102,7 @@ GameSettings.prototype.Attributes.PlayerCiv = class PlayerCiv extends GameSettin
 	_set(playerIndex, value)
 	{
 		const map = this._getMapData(playerIndex);
-		if (!!map)
+		if (map)
 		{
 			this.values[playerIndex] = map;
 			this.locked[playerIndex] = true;
diff --git a/binaries/data/mods/public/gamesettings/attributes/PlayerPlacement.js b/binaries/data/mods/public/gamesettings/attributes/PlayerPlacement.js
index de46510837..f46a23481f 100644
--- a/binaries/data/mods/public/gamesettings/attributes/PlayerPlacement.js
+++ b/binaries/data/mods/public/gamesettings/attributes/PlayerPlacement.js
@@ -15,7 +15,7 @@ GameSettings.prototype.Attributes.PlayerPlacement = class PlayerPlacement extend
 
 	fromInitAttributes(attribs)
 	{
-		if (!!this.getLegacySetting(attribs, "PlayerPlacement"))
+		if (this.getLegacySetting(attribs, "PlayerPlacement"))
 			this.value = this.getLegacySetting(attribs, "PlayerPlacement");
 	}
 
diff --git a/binaries/data/mods/public/gamesettings/attributes/Relic.js b/binaries/data/mods/public/gamesettings/attributes/Relic.js
index bb42b3a445..5f55a0b8e4 100644
--- a/binaries/data/mods/public/gamesettings/attributes/Relic.js
+++ b/binaries/data/mods/public/gamesettings/attributes/Relic.js
@@ -21,9 +21,9 @@ GameSettings.prototype.Attributes.Relic = class Relic extends GameSetting
 
 	fromInitAttributes(attribs)
 	{
-		if (!!this.getLegacySetting(attribs, "RelicCount"))
+		if (this.getLegacySetting(attribs, "RelicCount"))
 			this.setCount(this.getLegacySetting(attribs, "RelicCount"));
-		if (!!this.getLegacySetting(attribs, "RelicDuration"))
+		if (this.getLegacySetting(attribs, "RelicDuration"))
 			this.setDuration(this.getLegacySetting(attribs, "RelicDuration"));
 	}
 
diff --git a/binaries/data/mods/public/gamesettings/attributes/SeaLevelRise.js b/binaries/data/mods/public/gamesettings/attributes/SeaLevelRise.js
index b220cc313f..3700793500 100644
--- a/binaries/data/mods/public/gamesettings/attributes/SeaLevelRise.js
+++ b/binaries/data/mods/public/gamesettings/attributes/SeaLevelRise.js
@@ -16,7 +16,7 @@ GameSettings.prototype.Attributes.SeaLevelRise = class SeaLevelRise extends Game
 
 	fromInitAttributes(attribs)
 	{
-		if (!!this.getLegacySetting(attribs, "SeaLevelRiseTime"))
+		if (this.getLegacySetting(attribs, "SeaLevelRiseTime"))
 			this.setValue(this.getLegacySetting(attribs, "SeaLevelRiseTime"));
 	}
 
diff --git a/binaries/data/mods/public/gamesettings/attributes/TriggerScripts.js b/binaries/data/mods/public/gamesettings/attributes/TriggerScripts.js
index 6daf04d7b3..3454d55170 100644
--- a/binaries/data/mods/public/gamesettings/attributes/TriggerScripts.js
+++ b/binaries/data/mods/public/gamesettings/attributes/TriggerScripts.js
@@ -16,7 +16,7 @@ GameSettings.prototype.Attributes.TriggerScripts = class TriggerScripts extends
 
 	fromInitAttributes(attribs)
 	{
-		if (!!this.getLegacySetting(attribs, "TriggerScripts"))
+		if (this.getLegacySetting(attribs, "TriggerScripts"))
 			this.customScripts = new Set(this.getLegacySetting(attribs, "TriggerScripts"));
 	}
 
diff --git a/binaries/data/mods/public/gui/gamesetup/Pages/AIConfigPage/AIDescription.js b/binaries/data/mods/public/gui/gamesetup/Pages/AIConfigPage/AIDescription.js
index 5c72a148af..a26f77dfef 100644
--- a/binaries/data/mods/public/gui/gamesetup/Pages/AIConfigPage/AIDescription.js
+++ b/binaries/data/mods/public/gui/gamesetup/Pages/AIConfigPage/AIDescription.js
@@ -20,7 +20,7 @@ class AIDescription
 	render()
 	{
 		let AI = g_GameSettings.playerAI.get(this.playerIndex);
-		if (!!AI)
+		if (AI)
 			AI = g_Settings.AIDescriptions.find(desc => desc.id == AI.bot);
 		this.aiDescription.caption = AI ? AI.data.description : this.NoAIDescription;
 	}
diff --git a/binaries/data/mods/public/gui/gamesetup/Pages/AIConfigPage/Controls/AIBehavior.js b/binaries/data/mods/public/gui/gamesetup/Pages/AIConfigPage/Controls/AIBehavior.js
index cfe4f1af4f..1a5fe7ea14 100644
--- a/binaries/data/mods/public/gui/gamesetup/Pages/AIConfigPage/Controls/AIBehavior.js
+++ b/binaries/data/mods/public/gui/gamesetup/Pages/AIConfigPage/Controls/AIBehavior.js
@@ -14,7 +14,7 @@ AIGameSettingControls.AIBehavior = class extends AIGameSettingControlDropdown
 
 		const ai = g_GameSettings.playerAI.get(this.playerIndex);
 		this.setHidden(!ai);
-		if (!!ai)
+		if (ai)
 			this.setSelectedValue(ai.behavior);
 	}
 
diff --git a/binaries/data/mods/public/gui/gamesetup/Pages/AIConfigPage/Controls/AIDifficulty.js b/binaries/data/mods/public/gui/gamesetup/Pages/AIConfigPage/Controls/AIDifficulty.js
index fd715e0d4c..dfb56a7433 100644
--- a/binaries/data/mods/public/gui/gamesetup/Pages/AIConfigPage/Controls/AIDifficulty.js
+++ b/binaries/data/mods/public/gui/gamesetup/Pages/AIConfigPage/Controls/AIDifficulty.js
@@ -14,7 +14,7 @@ AIGameSettingControls.AIDifficulty = class extends AIGameSettingControlDropdown
 
 		const ai = g_GameSettings.playerAI.get(this.playerIndex);
 		this.setHidden(!ai);
-		if (!!ai)
+		if (ai)
 			this.setSelectedValue(ai.difficulty);
 	}
 
diff --git a/binaries/data/mods/public/gui/gamesetup/Pages/AIConfigPage/Controls/AISelection.js b/binaries/data/mods/public/gui/gamesetup/Pages/AIConfigPage/Controls/AISelection.js
index b4cbbc4a94..0fe80e7df8 100644
--- a/binaries/data/mods/public/gui/gamesetup/Pages/AIConfigPage/Controls/AISelection.js
+++ b/binaries/data/mods/public/gui/gamesetup/Pages/AIConfigPage/Controls/AISelection.js
@@ -22,7 +22,7 @@ AIGameSettingControls.AISelection = class extends AIGameSettingControlDropdown
 	{
 		const ai = g_GameSettings.playerAI.get(this.playerIndex);
 		this.setHidden(!ai);
-		if (!!ai)
+		if (ai)
 			this.setSelectedValue(ai.bot);
 		else
 			this.setSelectedValue(undefined);
diff --git a/binaries/data/mods/public/simulation/components/StatusEffectsReceiver.js b/binaries/data/mods/public/simulation/components/StatusEffectsReceiver.js
index 96b1f1123f..d3bc39b6f9 100644
--- a/binaries/data/mods/public/simulation/components/StatusEffectsReceiver.js
+++ b/binaries/data/mods/public/simulation/components/StatusEffectsReceiver.js
@@ -68,7 +68,7 @@ StatusEffectsReceiver.prototype.AddStatus = function(baseCode, data, attacker =
 			let temp;
 			do
 				temp = statusCode + "_" + i++;
-			while (!!this.activeStatusEffects[temp]);
+			while (this.activeStatusEffects[temp]);
 			statusCode = temp;
 		}
 	}
diff --git a/binaries/data/mods/public/simulation/helpers/Attack.js b/binaries/data/mods/public/simulation/helpers/Attack.js
index e1bd334a85..dfa13251ff 100644
--- a/binaries/data/mods/public/simulation/helpers/Attack.js
+++ b/binaries/data/mods/public/simulation/helpers/Attack.js
@@ -336,7 +336,7 @@ AttackHelper.prototype.HandleAttackEffects = function(target, data, bonusMultipl
 	});
 
 	// We do not want an entity to get XP from active Status Effects.
-	if (!!data.attackData.StatusEffect)
+	if (data.attackData.StatusEffect)
 		return true;
 
 	const cmpPromotion = Engine.QueryInterface(data.attacker, IID_Promotion);
diff --git a/binaries/data/mods/public/simulation/helpers/InitGame.js b/binaries/data/mods/public/simulation/helpers/InitGame.js
index 034a5e67cd..3db0154de5 100644
--- a/binaries/data/mods/public/simulation/helpers/InitGame.js
+++ b/binaries/data/mods/public/simulation/helpers/InitGame.js
@@ -49,12 +49,12 @@ function InitGame(settings)
 
 		if (settings.PlayerData[i])
 		{
-			if(!!settings.PlayerData[i].Removed)
+			if(settings.PlayerData[i].Removed)
 			{
 				cmpPlayer.Defeat(undefined);
 				continue;
 			}
-			else if (!!settings.PlayerData[i].AI)
+			else if (settings.PlayerData[i].AI)
 			{
 				cmpAIManager.AddPlayer(settings.PlayerData[i].AI, i, +settings.PlayerData[i].AIDiff, settings.PlayerData[i].AIBehavior || "random");
 				cmpPlayer.SetAI(true);
diff --git a/eslint.config.mjs b/eslint.config.mjs
index 0cbc63fdd6..82e85929cd 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -34,7 +34,7 @@ const configEslintRecommended = {
 		"no-dupe-keys": "warn",
 		"no-duplicate-case": "warn",
 		"no-empty": "warn",
-		"no-extra-boolean-cast": "off",
+		"no-extra-boolean-cast": "warn",
 		"no-func-assign": "warn",
 		"no-irregular-whitespace": "warn",
 		"no-obj-calls": "warn",