My attention was brought to this theme when researching a German offensive on the Russian front for a war game. I was looking at a multi volume work called "Kriegstagebuch des Oberkommandos der Werhrmacht" or in English, War Diaries of the German High Command.
I knew all of the main ones like Seelöwe and Barbarossa and such like, but I started finding names that I had never come across before. It has taken several weeks to compile this list and even though it runs into over 240 operational code words, I am sure there must be more. I have split them up into theaters of operations for easy reference, pre-war, western front, Mediterranean and eastern fronts. They are further split into years 1940 to 1945.
OKW Headquartiers at Rastenburg
FALL ROT (Case Red) Plan for a two front war, mainly against France, 1935.
SCHULUNG (Schooling) Operational plan for an attack on Czechoslovakia and a defence in the west, 1935.
FALL GRÜN (Case Green) Another plan for a two front war, this time with the main attack against Czechoslovakia, western front being a secondary attack, 1937.
FALL OTTO ( Case Otto) Operational study in case of the restoration of the monarchy in Austria, 1937.
FALL RICHARD ( Case Richard) Plans for a Kriegemarine attack against Communist Spain, 1937.
FALL ROT-GRÜN ( Case Red-Green) Combination of Case Red and Case Green, with the main attack in the south-east, 1937.
FALL BLAU (Case Blue) Operational plans for a Luftwaffe attack against Great Britain 1938-1939.
Z-PLAN (Plan Z) The construction plans for the Kriegsmarine in a ten year projection 1938-1948, the first rejected version was called the Y-Plan.
GELB (Yellow) German offensive in the west October 1939-May 1940.
WEISS (White) German offensive against Poland 1939.
ADLERTAG (Eagle Day) Air war against England 1940
ATTILA Planned support should Weygand fall from power or if the French fleet goes over to England. Replaced by a plan in 1942 of the same name.
HARTMUT U-boat operations to protect Operation Weserübung (Denmark and Norway).
HERBSTREISE (Autumn Journey) Code Word for fake operations in Norway and Holland during the planned landings in England September 1940.
MARIANNE E-Boat attacks on Dover December 1940.
NORD (North) Early name for the operations in Norway, sometimes known as N.
NORDMARK (Northern Borderland) German Kriegsmarine operations February 1940.
OPERATION ROT (Operation Red) Second phase of the invasion of France.
OSKAR E-Boat operations at Dover December 1940.
ROT (Red) See Operation Rot.
SEELÖWE (Sealion) Planned invasion of England 1940-41.
TANNENBAUM (Pine Tree) Operational plan against the Swiss.
WESERÜBUNG ( Weser Exercise) Operations against Denmark and Norway.
WIKINGER (Vikings) Kriegsmarine Destroyer operations off Doggerbank February 1940.
AUGSBURG A E-Boat attacks off Eastbourne February 1941.
AUGSBURG B E-Boat attacks off Eastbourne March 1941.
HAIFISCH I (Shark one) Fake attack planned on England from North France.
HAIFISCH II (Shark two) Variant on Haifisch I proposed by OB West.
HARPUNE (Harpoon) Fake attack planned on England from Norway.
JUNO Kriegsmarine operations June 1941.
RENATE E-Boat operations off Dover January 1941.
RHEINÜBUNG (Rhine Exercise) Battleship Bismarck operations in the Atlantic.
WEBER (Weaver) Kriegsmarine operations on the English south-east coast January 1941.
ANTON The march into Vichy France, November 1942.
ATTILA The planned (1942) occupation of Vichy France, replaced by Anton.
CERBERUS The Channel Dash, Scharnhorst, Gneisenau and Prinz Eugen leave Brest and enter the North Sea.
ELCH (Elk) Build up of forces in Norway, 7th April 1942.
PAUKENSCHLAG (Beat the Drums) U-Boat operations on the American coast, January 1942.
REGENBOGEN (Rainbow) Operations against an Allied convoy in the North Sea, 31st December 1942.
RÖSSELSPRUNG* (Knights Move) Sea and air attacks against an Allied convoy in the North Sea, July 1942. *(Rösselsprung also used in Yugoslavia 1944).
SCHNEE (Snow) Build up of forces in Norway December 1942.
SEELÖWE (Sealion) Planned invasion of England, dropped in February 1942.
WOLKE (Cloud) Extra forces sent to Norway in November 1942´.
BRUNHILDE The building of the 282nd Infantry Division from the remnants of the 182nd and the 165th Reserve Divisions.
FALKE (Falcon) Expected Allied Landing in Norway 1943.
GROSSKRAFTWERK NORDWEST (Power Plants in the north-west) The planned rocket bases for the further attacks against England.
HANNA Expected Allied landings in Denmark 1943.
WESTFALL Expected Allied landings in northern France 1943.
ABWEHRSCHLACHT (Defensive battle) Original name for the Ardennes offensive.
BLUME I, BLUME II (Flowers one and two) Allied landing in France, I. Channel Coast, II. The Southern coast.
DOKTOR GUSTAV NAGEL Expected Allied landings in Denmark and Norway 1944.
GREIF (Griffin) Operations behind the front lines in the Ardennes offensive.
HERBSTNEBEL (Autumn Fog) Early name for the Ardennes offensive (also the name for operations in northern Italy 1944).
NORDWIND (North Wind) Offensive in Alsass, 31st December 1944.
WACHT (Guard) Early name for Ardennes offensive.
WACHT AM RHEIN ( Guard the Rhine) Final name for the Ardennes Offensive.
BODENPLATTE (Ground Plate)Luftwaffe all out attack against the Allied air forces, 1st January 1945.
WESTGOTEN-BEWEGUNG (West Goths Movement) Moving the Home Forces to the western front.
ZAHNARZT (Dentist) Offensive in Elsass, January 1945.
ALPENVIELCHEN (Cyclamen) Planed operations in Albania.
FELIX Planed occupation of Gibaltar with Spanish help.
HANNIBAL Planed occupation of the island of Lemnos.
ISABELLA Plans against a British landing in Spain and Portugal.
MARITA German offensive plans against Greece 1940.
KAMELIE Plan for the occupation of Corsica.
MERKUR (Mercury) Occupation of Crete.
SONNENBLÜME (Sun Flowers) Plans for German help in North Africa.
AIDA Attacks in Egypt, June/July 1942.
BRAUN (Brown) The building of a bridgehead in Tunis, November 1942.
GISELA Plans for the occupation of northern Spanish ports should the Allies invade Spain, October 1942-Spring 1943.
HERKULES Planed invasion of Malta, April-August 1942.
ILONA As per GISELA, but May-October 1942.
LILA Occupation of Toulon and the capture of the French fleet.
THESEUS Plan of attack for Panzerarmee Afrika, May 1942.
ACHSE (Axis) Plan for the disarming of Italian forces.
ADLER (Eagle) Plan for mopping up Italian forces in Fiume-Zara-Split and various islands.
ALARICH Occupation of Italy after the Italian surrender.
DELTA Mopping up operations in west Greece.
DORA Special Command in North Africa.
EICHE (Oak) Plan to place Mussolini back in power.
EISBÄR (Pola Bear) Occupation of the island of Cos.
FEUERSTEIN (Flint Stone) Securing the Alpine Passes after the Italian surrender.
FORELLE 1,2 Plans against British moves in the Aegean islands.
GERTRUD German and Bulgarian plans should Turkey enter the war.
HERBSTGEWITTER II (Autumn Thunder Storm Two) Anti-partisan action in Bosnia.
ISTRIEN Anti-partisan operations in Italy, Armeegruppe B.
KONSTANTIN German march into the Italian areas of the Balkans after the Italian surrender.
KOPENHAGEN Occupation of the Alpen Passes on the French-Italian border after the Italian surrender (Mont Cenis).
KUGELBLITZ (Ball of Lightning) Cleaning up in eastern Bosnia.
LEOPARD Occupation of Lemnos
MARDER I (Marten One) Expected Allied landing on the Ligurian coast.
MARDER II (Marten Two) Expected Allied landings on the Adriatic coast.
NAPFKUCHEN (Cake) Anti-partisan operation in Yugoslavia.
NÜRNBERG (Nuremburg) Increase to security on the Spanish border.
OLYMP (Olympia) Anti-partisan operations in Greece.
PAULA Anti-partisan operations in Serbia.
POSEIDON Operations in Samos.
RICHARD Additional operations during operation ACHSE.
RICHARD Landings near Rome.
SCHNEESTURM (Snow Storm) Anti-partisan operations in Bosnia.
SCHWARZ, SCHWARZ I, SCHWARZ II, (Black) Operations in Croatia.
STUDENT Plan for placing the Fascists back into power in Italy after the Italian surrender.