Add if no other Civilization has adopted [policy/belief] Conditional

core/src/com/unciv/models/Religion.kt

@@ -71,6 +71,7 @@ class Religion() : INamed, IsPartOfGameInfoSerialization {
     }
 
     fun addBelief(belief: Belief) = addBeliefs(listOf(belief))
+    fun addBelief(beliefName: String) = gameInfo.ruleset.beliefs[beliefName]?.let { addBelief(it) }
 
     @Readonly
     fun getIconName() =

core/src/com/unciv/models/ruleset/unique/Conditionals.kt

@@ -170,7 +170,13 @@ object Conditionals {
                 else tech.researchedTechnologies.none { it.matchesFilter(filter) }
             }
             UniqueType.ConditionalWhileResearching -> checkOnCiv { tech.currentTechnology()?.matchesFilter(conditional.params[0]) == true }
-
+            UniqueType.ConditionalNoCivAdopted -> checkOnGameInfo {
+                civilizations.none {
+                    it.isMajorCiv() &&
+                    it.isAlive() &&
+                    (it.policies.isAdopted(conditional.params[0]) || it.religionManager.religion?.hasBelief(conditional.params[0]) == true)
+                }
+            }
             UniqueType.ConditionalAfterPolicyOrBelief ->
                 checkOnCiv { policies.isAdopted(conditional.params[0]) || religionManager.religion?.hasBelief(conditional.params[0]) == true }
             UniqueType.ConditionalBeforePolicyOrBelief ->

core/src/com/unciv/models/ruleset/unique/UniqueType.kt

@@ -719,6 +719,7 @@ enum class UniqueType(
         docDescription = "This condition is fulfilled while the technology is actively being researched (it is the one research points are added to)"),
 
     ConditionalFirstCivToAdopt("if no other Civilization has adopted this", UniqueTarget.Conditional),
+    ConditionalNoCivAdopted("if no Civilization has adopted [policy/belief]", UniqueTarget.Conditional),
     ConditionalAfterPolicyOrBelief("after adopting [policy/belief]", UniqueTarget.Conditional),
     ConditionalBeforePolicyOrBelief("before adopting [policy/belief]", UniqueTarget.Conditional),
 

docs/Modders/uniques.md

@@ -3303,6 +3303,11 @@ Simple unique parameters are explained by mouseover. Complex parameters are expl
 ??? example  "<if no other Civilization has adopted this>"
 	Applicable to: Conditional
 
+??? example  "<if no Civilization has adopted [policy/belief]>"
+	Example: "<if no Civilization has adopted [Oligarchy]>"
+
+	Applicable to: Conditional
+
 ??? example  "<after adopting [policy/belief]>"
 	Example: "<after adopting [Oligarchy]>"
 

tests/src/com/unciv/uniques/GlobalUniquesTests.kt

@@ -661,6 +661,37 @@ class GlobalUniquesTests {
         }
     }
 
+    @Test
+    fun conditionalFirstCivToAdopt() {
+        val civInfo = game.addCiv()
+        val city = game.addCity(civInfo, game.getTile(Vector2.Zero), true)
+        // Policy
+        civInfo.policies.run {
+            freePolicies++
+            adopt(getPolicyByName("Tradition"))
+        }
+        // Belief
+        game.addReligion(civInfo)
+        civInfo.religionManager.religion?.run {
+            addBelief("Ancestor Worship")
+            addBelief("Not A Belief")
+        }
+        val tests = listOf(
+            "<if no Civilization has adopted [Oligarchy]>" to 1,
+            "<if no Civilization has adopted [Tradition]>" to 0,
+            "<if no Civilization has adopted [God of Craftsman]>" to 1,
+            "<if no Civilization has adopted [Ancestor Worship]>" to 0,
+            "<if no Civilization has adopted [Not A Belief]>" to 1,
+        )
+        Assert.assertEquals(civInfo.gold, 0)
+        for ((test, expected) in tests) {
+            val building = game.createBuilding("Gain [1] [Gold] $test")
+            city.cityConstructions.addBuilding(building)
+            Assert.assertEquals("Conditional `$test` should be: $expected", civInfo.gold, expected)
+            civInfo.addGold(-civInfo.gold) // Reset the gold
+        }
+    }
+
     // endregion
 
     // region Great Persons