add a low item count check warning

main.lua

@@ -567,11 +567,19 @@ end
 EID:AddCallback(ModCallbacks.MC_POST_UPDATE, EID.onGameUpdate)
 
 local hasShownAchievementWarning = false
+
 local function renderAchievementInfo()
-	if REPENTANCE and not EID.Config.DisableAchievementCheck and game:GetFrameCount() < 10*30 and game.Challenge == 0 then
+	if REPENTANCE and not EID.Config.DisableAchievementCheck and game:GetFrameCount() < 10*30 then
+		if EID:GetMaxCollectibleID() < EID.XMLMaxItemID then
+			local demoDescObj = EID:getDescriptionObj(-999, -1, 1)
+			demoDescObj.Name = EID:getDescriptionEntry("AchievementWarningTitle") or ""
+			demoDescObj.Description = EID:getDescriptionEntry("OutdatedModWarningText") or ""
+			EID:displayPermanentText(demoDescObj)
+			hasShownAchievementWarning = true
+		else
 			local characterID = Game():GetPlayer(0):GetPlayerType()
 			--ID 21 = Tainted Isaac. Tainted characters have definitely beaten Mom! (Fixes Tainted Lost's item pools ruining this check)
-		if (characterID < 21) then
+			if characterID < 21 and game.Challenge == 0 then
 				local hasBookOfRevelationsUnlocked = EID:isCollectibleUnlockedAnyPool(CollectibleType.COLLECTIBLE_BOOK_OF_REVELATIONS or CollectibleType.COLLECTIBLE_BOOK_REVELATIONS)
 				if not hasBookOfRevelationsUnlocked then
 					local hasCubeOfMeatUnlocked = EID:isCollectibleUnlockedAnyPool(CollectibleType.COLLECTIBLE_CUBE_OF_MEAT)
@@ -584,6 +592,7 @@ local function renderAchievementInfo()
 					end
 				end
 			end
+		end
 	elseif hasShownAchievementWarning then
 		EID:hidePermanentText()
 	end
@@ -676,6 +685,7 @@ local function onRender(t)
 		end
 	end
 
+
 	local closest = EID.lastDescriptionEntity
 
 	if EID.lastDist / 40 > tonumber(EID.Config["MaxDistance"]) then