diff --git a/game/compat_1.2.nut b/game/compat_1.2.nut
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--- /dev/null
+++ b/game/compat_1.2.nut
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+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+GSLog.Info("1.2 API compatibility in effect.");
+
+GSTown._SetGrowthRate <- GSTown.SetGrowthRate;
+GSTown.SetGrowthRate <- function(town_id, days_between_town_growth)
+{
+	/* Growth rate 0 caused resetting the custom growth rate. While this was undocumented, it was used nevertheless (ofc). */
+	if (days_between_town_growth == 0) days_between_town_growth = GSTown.TOWN_GROWTH_NORMAL;
+	return GSTown._SetGrowthRate(town_id, days_between_town_growth);
+}
+
+/* 1.5 adds a game element reference to the news. */
+GSNews._Create <- GSNews.Create;
+GSNews.Create <- function(type, text, company)
+{
+    return GSNews._Create(type, text, company, GSNews.NR_NONE, 0);
+}
+
+/* 1.9 adds a vehicle type parameter. */
+GSBridge._GetName <- GSBridge.GetName;
+GSBridge.GetName <- function(bridge_id)
+{
+	return GSBridge._GetName(bridge_id, GSVehicle.VT_RAIL);
+}
+
+/* 1.11 adds a tile parameter. */
+GSCompany._ChangeBankBalance <- GSCompany.ChangeBankBalance;
+GSCompany.ChangeBankBalance <- function(company, delta, expenses_type)
+{
+	return GSCompany._ChangeBankBalance(company, delta, expenses_type, GSMap.TILE_INVALID);
+}