What are the differences between the various versions of Axis & Allies?
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This is a running list of the changes to the the traditional 1942 version of Axis &amp; Allies listing each progressive revision below it with all the changes from the previous version--just like software release notes. 

Please add to the list if you see something missing.



Axis &amp; Allies (Nova Games Edition) — 1981


Initial release


Axis &amp; Allies — 1984

a.k.a. "Axis &amp; Allies: Classic", 1986 reprint: "Axis &amp; Allies 2nd Edition"


Map and setup is changed
Sequence of play has been revised
Costs and incomes are 1/100th that of the previous games
Bombardment is added
Neutral countries can no longer be occupied (previously, it could be done by paying a cost)
Fighters can no longer be built directly onto carriers; they must be built in land areas and then travel to carriers
Air units no longer add 1 to their movement if they start on islands
Loading land units on ships is now part of the land movement phase, rather than naval movement phase
Submarines now participate in normal naval combat, instead of firing a single salvo during their own phase prior to naval combat
National advantages have been removed
The option to produce an atomic bomb through technology research has been removed




Axis &amp; Allies: Revised — 2004

a.k.a. Axis &amp; Allies 20th Anniversary Edition


Map and setup has changed
The Artillery and Destroyer units have been added
Cost of fighters has been reduced from 12 IPCs to 10
Transports may now carry 1 armor + 1 infantry
Armor attacks and defends on a 3+
Victory cities have been added as a replacement for economic victory


Axis &amp; Allies: 50th Anniversary Edition — 2008


Italy and China have been added as factions
A 1941 setup has been added in addition to the standard 1942 setup
The Cruiser unit has been added


Axis &amp; Allies: Spring 1942 — 2009

a.k.a. Axis &amp; Allies 25th Anniversary Edition


The changes from the 50th Anniversary Edition are not incorporated except as follows


The Cruiser unit has been added



Axis &amp; Allies: Spring 1942 (Second Edition) — 2012


The Anti-aircraft Artillery unit has been added