This list contains combat vehicles which never left the design phase or had an extremely limited production (usually < 10).

Australia Australian Cruiser Tank Mark 3 "Thunderbolt" Australian Cruiser Tank Mark 4 Rhino heavy armoured car Australian experimental light tank

Canada Skink anti-aircraft tank

Germany

Entwicklung Series Entwicklung series, a comprehensive redesign of German armor from small tracked vehicles to a 100-ton super-heavy tank. Only a single E-100 chassis was completed Leichttraktor, pre-war light tank, four built Neubaufahrzeug, pre-war heavy tank design, five built Panther II, development of the Panzerkampfwagen V "Panther". A single chassis was built Panzerkampfwagen VII "Löwe", a super-heavy tank project that never reached prototype stage Panzerkampfwagen VIII "Maus", a super-heavy tank. Two prototypes built Panzerkampfwagen IX & Panzerkampfwagen X Paper project Landkreuzer P. 1000 Ratte; paper project Landkreuzer P. 1500 Monster; paper project 12.8 cm Selbstfahrlafette auf VK 30.01(H) "Sturer Emil" - tank destroyer; 2 built Heuschrecke 10, Krupp's design for a new self-propelled artillery gun VK 3001 (P) - medium tank; Two hulls built VK 3002(DB) - prototype medium tank; one built VK 4501 (P) - Porsche Tiger tank; 100 hulls built, 90 converted to Ferdinands, one Tiger (P) built, 3 Bergepanzer Tiger (p) and 3 Rammtigers built. VK 45.02 (P), three turrets built Dicker Max, two prototypes built VK 20, medium tank proposed to replace the Panzer III and Panzer IV; paper project Panzer-Selbstfahrlafette II, half-track tank destroyer; two built Panzer-Selbstfahrlafette IV Ausf. C, SPG, 3 built Geschützwagen Tiger, self-propelled artillery gun; one partial prototype built VK 1602 Leopard, reconnaissance tank; paper project

Hungary Straussler V-4, amphibious light tank, several prototypes sent to various nations Toldi Páncélvadász, Toldi 38M I(A20) Converted to use as tank destroyer mounting a German 7.5 cm Pak 40 Anti-Tank gun; one protoype built Toldi II 44M Buzogányvető, Toldi 42M IIA(B40) equipped with two 44M Buzogányvető anti-tank rockets, one tank converted 43M Turán III, medium tank; direct upgrade to 41M Turán II medium tank, one prototype produced as well as trial vehicle 44M Zrínyi I, tank destroyer based on the 43M Zrínyi II assault gun; one prototype built 44M Tas, medium/heavy tank, two unfinished prototypes built Italy Semovente da 20/70 quadruplo, self-propelled anti-aircraft gun Semovente da 149/40, self-propelled gun Fiat M16/43, fast medium tank P43 heavy tank, Fiat Ansaldo's design for a new heavy tank.

Japan

Type 95 heavy tank; 4 built in 1934 Type 97 Chi-Ni medium tank; one prototype built Type 98 Chi-Ho medium tank; 4 built, two in 1940 and two in 1941 O-I super-heavy tank design in the 120-ton range. Exact stage of development unknown Type 97 Ki-To SPAAG self-propelled anti-aircraft gun on Type 97 Te-Ke tankette chassis; one prototype built Type 98 Ta-Se single 20 mm self-propelled anti-aircraft gun on a Type 98 Ke-Ni chassis Type 98 20 mm AAG tank twin 20 mm self-propelled anti-aircraft gun on a Type 98 Ke-Ni chassis Type 1 Ho-I infantry support gun tank; one prototype built ATG Carrier So-To; light armored transport with an AT Gun in a Type 97 Te-Ke tankette structure Type 3 Ke-Ri light tank; a few prototypes were produced Special number 3 light tank Ku-Ro; only a prototype mock-up was completed Experimental Type 97 Chi-Yu mine flail tank; one prototype built Experimental Type 97 mine clearing tank GS; one prototype built

Type 97 Experimental flamethrower tank; two prototypes. The first version replaced the hull machine gun with a flamethrower. The second version was fitted with two large, elongated fuel tanks and two flamethrowers on each side of the chassis. It utilized an electric flame igniter system. Type 2 Ku-Se 75 mm self-propelled gun on a Type 1 Chi-He chassis Type 4 Chi-To medium tank; two completed and four chassis manufactured Type 5 Chi-Ri medium tank; one incomplete prototype built Type 4 Ho-To 12 cm self-propelled gun on a modified Type 95 Ha-Go chassis Type 5 Ho-Ru 47 mm self-propelled gun; a light tank destroyer akin to the German Hetzer; one prototype built Type 5 Ke-Ho light tank; one prototype built Hi-Ro Sha 10 cm cannon self-propelled gun on Type 95 heavy tank chassis Ji-Ro Type 92 10 cm cannon self-propelled gun on Type 95 heavy tank chassis Type 5 Na-To tank destroyer; two built Type 5 To-Ku amphibious tank Naval 12 cm SPG; one prototype built with a mounted Type 10 120 mm gun on a Type 97 Chi-Ha chassis Experimental anti-aircraft tank Ta-Ha; incomplete prototype on a Type 1 Chi-He chassis Ka-To 105 mm SP AT gun was a combination of the Type 5 Na-To open top superstructure and the extended hull of the Type 4 Chi-To. Exact stage of development unknown Type 5 Ho-Ri tank destroyer with a 105 mm cannon and an additional 37 mm gun; exact status unknown Type 5 15 cm SPG Ho-Chi; similar to Type 1 Ho-Ni I and Type 4 Ho-Ro SPGs, with a Type 96 15 cm (149.1 mm) howitzer mounted on a Type 97 chassis. Stage of development unknown

New Zealand Schofield tank Bob Semple tank

Poland 9TP light tank 4TP (light) tank 10TP tank 14TP medium tank 20/25TP medium tank PZInż 130 amphibious tank PZInż 152 PZInż 202 PZInż 222 PZInż 303 PZInż 342 PZInż 603 TKW (light) reconnaissance tank TKS-D light tank destroyer

Romania Mareșal tank destroyer TACAM T-38

Spain Verdeja

Soviet Union

Antonov A-40 T-43 medium tank SMK tank heavy tank; one built T-100 tank heavy tank T-150 SU-100Y Self-Propelled Gun 130mm gun on the T-100 chassis SU-14 heavy self-propelled gun on a T-35 chassis PPG tankette S-51 Self-Propelled Gun KV-3 KV-4 super-heavy tank; paper project KV-5 KV-7 KV-8 KV-9 KV-10 KV-11 KV-12 KV-13 Three prototypes built. KV-220 heavy tank; two built Object 245 rearmed IS-2 with a 100mm D-10T gun ISU-152-2 long barreled ISU-152 variant Object 704 IS-6 heavy tank Object 252U T-34-100 T-44-100 Object 701 IS-4, prototypes only

United Kingdom Tank, Heavy, TOG I Tank Heavy, TOG II Tank, Heavy Assault, Excelsior (A33) Tank, Infantry, Valiant (A38) Tank, Heavy Assault, Tortoise (A39) Tank, Infantry, Black Prince (A43) A20 heavy tank Alecto

United States

M6 heavy tank M7 medium tank M38 Wolfhound T14 heavy tank T18 howitzer motor carriage; 75 mm howitzer on a M3 chassis T20 medium tank T27 armored car T28 super-heavy tank T29 heavy tank T30 heavy tank T32 heavy tank T34 heavy tank T40/M9 tank destroyer T54 gun motor carriage T26E5 Uparmored T26E3 T55E1 gun motor carriage T82 howitzer motor carriage T84 howitzer motor carriage T88 gun motor carriage; 105 mm howitzer on a M18 chassis T92 howitzer motor carriage Super Pershing

See also List of armoured fighting vehicles of World War II