diff --git a/qt_ui/windows/newgame/QNewGameWizard.py b/qt_ui/windows/newgame/QNewGameWizard.py
index a1bb2a27..d5553bf5 100644
--- a/qt_ui/windows/newgame/QNewGameWizard.py
+++ b/qt_ui/windows/newgame/QNewGameWizard.py
@@ -10,13 +10,13 @@ from jinja2 import Environment, FileSystemLoader, select_autoescape
 
 from game import db
 from game.settings import Settings
+from game.theater.start_generator import GameGenerator, GeneratorSettings
 from qt_ui.widgets.spinsliders import TenthsSpinSlider
 from qt_ui.windows.newgame.QCampaignList import (
     Campaign,
     QCampaignList,
     load_campaigns,
 )
-from game.theater.start_generator import GameGenerator, GeneratorSettings
 
 jinja_env = Environment(
     loader=FileSystemLoader("resources/ui/templates"),
@@ -272,14 +272,21 @@ class TheaterConfiguration(QtWidgets.QWizardPage):
         # Faction description
         self.campaignMapDescription = QTextEdit("")
         self.campaignMapDescription.setReadOnly(True)
+        self.campaignMapDescription.setMaximumHeight(150)
+
+        self.performanceText = QTextEdit("")
+        self.performanceText.setReadOnly(True)
+        self.performanceText.setMaximumHeight(150)
 
         def on_campaign_selected():
             template = jinja_env.get_template("campaigntemplate_EN.j2")
+            template_perf = jinja_env.get_template("campaign_performance_template_EN.j2")
             index = campaignList.selectionModel().currentIndex().row()
             campaign = campaignList.campaigns[index]
             self.setField("selectedCampaign", campaign)
             self.campaignMapDescription.setText(template.render({"campaign": campaign}))
             self.faction_selection.setDefaultFactions(campaign)
+            self.performanceText.setText(template_perf.render({"performance": campaign.performance}))
 
         campaignList.selectionModel().setCurrentIndex(campaignList.indexAt(QPoint(1, 1)), QItemSelectionModel.Rows)
         campaignList.selectionModel().selectionChanged.connect(on_campaign_selected)
@@ -292,11 +299,6 @@ class TheaterConfiguration(QtWidgets.QWizardPage):
         mapSettingsLayout = QtWidgets.QGridLayout()
         mapSettingsLayout.addWidget(QtWidgets.QLabel("Invert Map"), 0, 0)
         mapSettingsLayout.addWidget(invertMap, 0, 1)
-
-        #mapSettingsLayout.addWidget(QtWidgets.QLabel("Start at mid game"), 1, 0)
-        #midgame = QtWidgets.QCheckBox()
-        #self.registerField('midGame', midgame)
-        #mapSettingsLayout.addWidget(midgame, 1, 1)
         mapSettingsGroup.setLayout(mapSettingsLayout)
 
         # Time Period
@@ -310,7 +312,6 @@ class TheaterConfiguration(QtWidgets.QWizardPage):
 
         # Register fields
         self.registerField('timePeriod', timePeriodSelect)
-        self.registerField('timePeriod', timePeriodSelect)
 
         timeGroupLayout = QtWidgets.QGridLayout()
         timeGroupLayout.addWidget(timePeriod, 0, 0)
@@ -319,10 +320,11 @@ class TheaterConfiguration(QtWidgets.QWizardPage):
 
         layout = QtWidgets.QGridLayout()
         layout.setColumnMinimumWidth(0, 20)
-        layout.addWidget(campaignList, 0, 0, 3, 1)
+        layout.addWidget(campaignList, 0, 0, 4, 1)
         layout.addWidget(self.campaignMapDescription, 0, 1, 1, 1)
-        layout.addWidget(mapSettingsGroup, 1, 1, 1, 1)
-        layout.addWidget(timeGroup, 2, 1, 1, 1)
+        layout.addWidget(self.performanceText, 1, 1, 1, 1)
+        layout.addWidget(mapSettingsGroup, 2, 1, 1, 1)
+        layout.addWidget(timeGroup, 3, 1, 1, 1)
         self.setLayout(layout)
 
 
diff --git a/resources/campaigns/battle_of_britain.json b/resources/campaigns/battle_of_britain.json
index 2220bd07..1eb7fb74 100644
--- a/resources/campaigns/battle_of_britain.json
+++ b/resources/campaigns/battle_of_britain.json
@@ -5,5 +5,6 @@
   "recommended_player_faction": "United Kingdom 1944",
   "recommended_enemy_faction": "Germany 1942",
   "description": "<p>Experience the Battle of Britain on the Channel map !<br/></p><p><strong>Note:</strong> It is not possible to cross the channel to capture enemy bases yet, but you can consider you won if you manage to destroy all the ennemy targets</p>",
-  "miz": "battle_of_britain.miz"
+  "miz": "battle_of_britain.miz",
+  "performance": 1
 }
\ No newline at end of file
diff --git a/resources/campaigns/black_sea.json b/resources/campaigns/black_sea.json
index 116c7a3b..4b9a3a51 100644
--- a/resources/campaigns/black_sea.json
+++ b/resources/campaigns/black_sea.json
@@ -3,5 +3,6 @@
   "theater": "Caucasus",
   "authors": "Colonel Panic",
   "description": "<p>A medium sized theater with bases along the coast of the Black Sea.</p>",
-  "miz": "black_sea.miz"
+  "miz": "black_sea.miz",
+  "performance": 1
 }
\ No newline at end of file
diff --git a/resources/campaigns/desert_war.json b/resources/campaigns/desert_war.json
index b268c8f9..2c076f9d 100644
--- a/resources/campaigns/desert_war.json
+++ b/resources/campaigns/desert_war.json
@@ -5,5 +5,6 @@
   "recommended_player_faction": "USA 2005",
   "recommended_enemy_faction": "Iran 2015",
   "description": "<p>This is a simple scenario in the Desert near Dubai and Abu-Dhabi. Progress from Liwa airbase to Al-Minhad.</p><p>This scenario shouldn't require too much performance.</p>",
-  "miz": "desert_war.miz"
+  "miz": "desert_war.miz",
+  "performance": 1
 }
\ No newline at end of file
diff --git a/resources/campaigns/dunkirk.json b/resources/campaigns/dunkirk.json
index 7c9a8f76..47859eab 100644
--- a/resources/campaigns/dunkirk.json
+++ b/resources/campaigns/dunkirk.json
@@ -5,5 +5,6 @@
   "recommended_player_faction": "Allies 1944",
   "recommended_enemy_faction": "Germany 1942",
   "description": "<p>In this scenario, your forces starts in Dunkirk and can be supported by the airfields on the other side of the Channel.</p><p>If you select the inverted configuration, you can play a German invasion of England.</p><p><strong>Note:</strong> B-17 should be operated from Manston airfield</p>",
-  "miz": "dunkirk.miz"
+  "miz": "dunkirk.miz",
+  "performance": 1
 }
\ No newline at end of file
diff --git a/resources/campaigns/emirates.json b/resources/campaigns/emirates.json
index d2e7fc26..78ffc4f9 100644
--- a/resources/campaigns/emirates.json
+++ b/resources/campaigns/emirates.json
@@ -5,5 +5,6 @@
   "recommended_player_faction": "USA 2005",
   "recommended_enemy_faction": "Iran 2015",
   "description": "<p>In this scenario, you can play an invasion of the Emirates and Oman, where your forces starts in Fujairah.</p><p><strong>Note:</strong> Fujairah airfield has very few slots for aircrafts, so it recommended to operate from carriers at the start of the campaign. Thus, a carrier-capable faction is recommended.</p>",
-  "miz": "emirates.miz"
+  "miz": "emirates.miz",
+  "performance": 1
 }
\ No newline at end of file
diff --git a/resources/campaigns/full_caucasus.json b/resources/campaigns/full_caucasus.json
index a11173ef..35fdc4a5 100644
--- a/resources/campaigns/full_caucasus.json
+++ b/resources/campaigns/full_caucasus.json
@@ -3,5 +3,6 @@
     "theater": "Caucasus",
     "authors": "george",
     "description": "<p>Full map of the Caucasus</p><p><strong>Note:</strong> This scenario is heavy on performance, enabling \"culling\" in settings is highly recommended.</p>",
-    "miz": "full_caucasus.miz"
+    "miz": "full_caucasus.miz",
+    "performance": 3
 }
\ No newline at end of file
diff --git a/resources/campaigns/golan_heights.json b/resources/campaigns/golan_heights.json
index 33757de3..bd6106b0 100644
--- a/resources/campaigns/golan_heights.json
+++ b/resources/campaigns/golan_heights.json
@@ -5,5 +5,6 @@
   "recommended_player_faction": "Israel 2000",
   "recommended_enemy_faction": "Syria 2011",
   "description": "<p>In this scenario, you start in Israel and the conflict is focused around the golan heights, an historically disputed territory.<br/><br/>You can use the inverted configuration to start on the Syrian side.<br/><br/>If this scenario is too heavy, try the lite version.</p>",
-  "miz": "golan_heights.miz"
+  "miz": "golan_heights.miz",
+  "performance": 2
 }
\ No newline at end of file
diff --git a/resources/campaigns/golan_heights_lite.json b/resources/campaigns/golan_heights_lite.json
index cec286cb..70addc83 100644
--- a/resources/campaigns/golan_heights_lite.json
+++ b/resources/campaigns/golan_heights_lite.json
@@ -5,5 +5,6 @@
   "recommended_player_faction": "Israel 2000",
   "recommended_enemy_faction": "Syria 2011",
   "description": "<p>In this scenario, you start in Israel and the conflict is focused around the golan heights, an historically disputed territory.<br/><br/>This scenario is designed to be performance friendly.</p>",
-  "miz": "golan_heights_lite.miz"
+  "miz": "golan_heights_lite.miz",
+  "performance": 1
 }
\ No newline at end of file
diff --git a/resources/campaigns/inherent_resolve.json b/resources/campaigns/inherent_resolve.json
index 497ab7de..10d8d2fe 100644
--- a/resources/campaigns/inherent_resolve.json
+++ b/resources/campaigns/inherent_resolve.json
@@ -5,5 +5,6 @@
   "recommended_player_faction": "USA 2005",
   "recommended_enemy_faction": "Insurgents (Hard)",
   "description": "<p>In this scenario, you start from Jordan, and have to fight your way through eastern Syria.</p>",
-  "miz": "inherent_resolve.miz"
+  "miz": "inherent_resolve.miz",
+  "performance": 1
 }
\ No newline at end of file
diff --git a/resources/campaigns/invasion_from_turkey.json b/resources/campaigns/invasion_from_turkey.json
index b1b86a8d..5610312a 100644
--- a/resources/campaigns/invasion_from_turkey.json
+++ b/resources/campaigns/invasion_from_turkey.json
@@ -5,5 +5,6 @@
   "recommended_player_faction": "Turkey 2005",
   "recommended_enemy_faction": "Insurgents (Hard)",
   "description": "<p>In this scenario, you start from Turkey and have to invade territories in northern Syria.</p>",
-  "miz": "invasion_from_turkey.miz"
+  "miz": "invasion_from_turkey.miz",
+  "performance": 1
 }
\ No newline at end of file
diff --git a/resources/campaigns/invasion_of_iran.json b/resources/campaigns/invasion_of_iran.json
index 5adfb17a..cb22512d 100644
--- a/resources/campaigns/invasion_of_iran.json
+++ b/resources/campaigns/invasion_of_iran.json
@@ -5,5 +5,6 @@
   "recommended_player_faction": "USA 2005",
   "recommended_enemy_faction": "Iran 2015",
   "description": "<p>In this scenario, you start in Bandar Abbas, and must invade Iran.</p>",
-  "miz": "invasion_of_iran.miz"
+  "miz": "invasion_of_iran.miz",
+  "performance": 3
 }
\ No newline at end of file
diff --git a/resources/campaigns/invasion_of_iran_[lite].json b/resources/campaigns/invasion_of_iran_[lite].json
index f3100887..fbeba09e 100644
--- a/resources/campaigns/invasion_of_iran_[lite].json
+++ b/resources/campaigns/invasion_of_iran_[lite].json
@@ -5,5 +5,6 @@
   "recommended_player_faction": "USA 2005",
   "recommended_enemy_faction": "Iran 2015",
   "description": "<p>This is lighter version of the invasion of Iran scenario.</p>",
-  "miz": "invasion_of_iran_lite.miz"
+  "miz": "invasion_of_iran_lite.miz",
+  "performance": 1
 }
\ No newline at end of file
diff --git a/resources/campaigns/normandy.json b/resources/campaigns/normandy.json
index 2ee32ae0..8a21115c 100644
--- a/resources/campaigns/normandy.json
+++ b/resources/campaigns/normandy.json
@@ -4,7 +4,7 @@
   "authors": "Khopa",
   "recommended_player_faction": "Allies 1944",
   "recommended_enemy_faction": "Germany 1944",
-  "performance": 3,
   "description": "<p>Normandy 1944 D-Day scenario.</p>",
-  "miz":"normandy.miz"
+  "miz":"normandy.miz",
+  "performance": 3
 }
\ No newline at end of file
diff --git a/resources/campaigns/normandy_small.json b/resources/campaigns/normandy_small.json
index f7a99b97..d09e9a77 100644
--- a/resources/campaigns/normandy_small.json
+++ b/resources/campaigns/normandy_small.json
@@ -5,5 +5,6 @@
   "recommended_player_faction": "Allies 1944",
   "recommended_enemy_faction": "Germany 1944",
   "description": "<p>A lighter version of the Normandy 1944 D-Day scenario.</p>",
-  "miz": "normandy_small.miz"
+  "miz": "normandy_small.miz",
+  "performance": 2
 }
\ No newline at end of file
diff --git a/resources/campaigns/north_caucasus.json b/resources/campaigns/north_caucasus.json
index 08f60007..3090b625 100644
--- a/resources/campaigns/north_caucasus.json
+++ b/resources/campaigns/north_caucasus.json
@@ -97,5 +97,6 @@
       "Maykop-Khanskaya",
       "Mineralnye Vody"
     ]
-  ]
+  ],
+  "performance": 1
 }
\ No newline at end of file
diff --git a/resources/campaigns/persian_gulf_full_map.json b/resources/campaigns/persian_gulf_full_map.json
index b47ecce3..8c6e581d 100644
--- a/resources/campaigns/persian_gulf_full_map.json
+++ b/resources/campaigns/persian_gulf_full_map.json
@@ -3,5 +3,6 @@
     "theater": "Persian Gulf",
     "authors": "Plob",
     "description": "<p>Full map of the Persian Gulf</p><p><strong>Note:</strong> This scenario is heavy on performance, enabling \"culling\" in settings is highly recommended.</p>",
-    "miz": "persian_gulf_full_map.miz"
+    "miz": "persian_gulf_full_map.miz",
+    "performance": 3
 }
\ No newline at end of file
diff --git a/resources/campaigns/russia_small.json b/resources/campaigns/russia_small.json
index 3d9c34f0..570c70ee 100644
--- a/resources/campaigns/russia_small.json
+++ b/resources/campaigns/russia_small.json
@@ -4,7 +4,7 @@
   "authors": "Khopa",
   "recommended_player_faction": "Russia 2010",
   "recommended_enemy_faction": "USA 1990",
-  "performance": "heavy",
   "description": "<p>A small theater in Russia, progress from Mozdok to Maykop.</p><p>This scenario is pretty simple, it is ideal if you want to run a short campaign. If your PC is not powerful, this is also the less performance heavy scenario.</p>",
-  "miz": "russia_small.miz"
+  "miz": "russia_small.miz",
+  "performance": 0
 }
\ No newline at end of file
diff --git a/resources/campaigns/syria_full_map_remastered.json b/resources/campaigns/syria_full_map_remastered.json
index d0df2b54..3a10f5c6 100644
--- a/resources/campaigns/syria_full_map_remastered.json
+++ b/resources/campaigns/syria_full_map_remastered.json
@@ -3,5 +3,6 @@
   "theater": "Syria",
   "authors": "Hawkmoon",
   "description": "<p>Full map of Syria</p><p><strong>Note:</strong>For a better early game experience is suggested to give the AI an high amount of starting money This scenario is heavy on performance, enabling \"culling\" in settings is highly recommended.</p>",
-  "miz": "syria_full_map_remastered.miz"
+  "miz": "syria_full_map_remastered.miz",
+  "performance": 3
 }
\ No newline at end of file
diff --git a/resources/campaigns/syrian_civil_war.json b/resources/campaigns/syrian_civil_war.json
index a4ec32a8..86fb6ad1 100644
--- a/resources/campaigns/syrian_civil_war.json
+++ b/resources/campaigns/syrian_civil_war.json
@@ -5,5 +5,6 @@
   "recommended_player_faction": "Russia 2010",
   "recommended_enemy_faction": "Insurgents (Hard)",
   "description": "<p>This scenario can be used to simulate parts of the Syrian Civil War.<br/><br/>You start on the coast with an airbase in Latakia, and ground forces in Tartus.<br/><br/>This scenario can also be used to simulate a western invasion of Syria.<br/><br/>In inverted configuration you start in Aleppo.</p>",
-  "miz": "syrian_civil_war.miz"
+  "miz": "syrian_civil_war.miz",
+  "performance": 2
 }
\ No newline at end of file
diff --git a/resources/campaigns/western_georgia.json b/resources/campaigns/western_georgia.json
index df1c755d..4fc680ea 100644
--- a/resources/campaigns/western_georgia.json
+++ b/resources/campaigns/western_georgia.json
@@ -109,5 +109,6 @@
       "Gudauta",
       "Sochi-Adler"
     ]
-  ]
+  ],
+  "performance": 1
 }
\ No newline at end of file
diff --git a/resources/ui/templates/campaign_performance_template_EN.j2 b/resources/ui/templates/campaign_performance_template_EN.j2
new file mode 100644
index 00000000..637f9ca7
--- /dev/null
+++ b/resources/ui/templates/campaign_performance_template_EN.j2
@@ -0,0 +1,33 @@
+{% if performance == 0 %}
+    <div style="color:#82A466">
+{% elif performance == 1 %}
+    <div style="color:yellow">
+{% elif performance == 2 %}
+    <div style="color:orange">
+{% else %}
+    <div style="color:red">
+{%endif %}
+
+<strong>Performance impact :&nbsp;</strong> {{performance}}/3
+
+{% if performance == 0 %}
+<p>
+This scenario is rather performance friendly.
+</p>
+{% elif performance == 1 %}
+<p>
+This scenario requires a very good computer to run.
+</p>
+{% elif performance == 2 %}
+<p>
+This scenario is not performance friendly. The usage of the culling settings is recommended for most users.
+</p>
+{% elif performance == 3 %}
+<p>
+This theater is huge, and will generate very complex DCS missions with hundreds of units, pushing the limits of DCS engine.
+An insanely powerful computer will be necessary to run it.
+Usage of culling settings will probably be mandatory for decent FPS.
+</p>
+{%endif %}
+
+</div>
\ No newline at end of file
diff --git a/resources/ui/templates/campaign_performance_template_FR.j2 b/resources/ui/templates/campaign_performance_template_FR.j2
new file mode 100644
index 00000000..455d2648
--- /dev/null
+++ b/resources/ui/templates/campaign_performance_template_FR.j2
@@ -0,0 +1,33 @@
+{% if performance == 0 %}
+    <div style="color:#82A466">
+{% elif performance == 1 %}
+    <div style="color:yellow">
+{% elif performance == 2 %}
+    <div style="color:orange">
+{% else %}
+    <div style="color:red">
+{%endif %}
+
+<strong>Impact sur les performances :&nbsp;</strong> {{performance}}/3
+
+{% if performance == 0 %}
+<p>
+Ce scénario est d'une taille limitée et pensé pour obtenir de bonnes performances en jeu.
+</p>
+{% elif performance == 1 %}
+<p>
+Ce scénario nécessite une machine puissante.
+</p>
+{% elif performance == 2 %}
+<p>
+Ce scénario n'est pas pensé pour la performance et requiert une machine très puissante.
+L'usage des paramètres "culling" est recommandé pour la plupart des utilisateurs.
+</p>
+{% elif performance == 3 %}
+<p>
+Ce scénario est gigantesque, et générera des missions DCS d'une grande compléxité contenant des centaines/milliers d'unités.
+Une machine extrêmement puissante est nécessaire, et l'utilisation des paramètres de "culling" sera obligatoire pour des performances décentes.
+</p>
+{%endif %}
+
+</div>
\ No newline at end of file