If you are downloading the game for the first time, you can find official PDF rulebooks for almost every version (Classic, 1942, Europe 1940, etc.) at AxisAllies.com to help you learn the mechanics.
For a no-download option, GamesByEmail offers a browser-based "WW2" game that uses the Axis & Allies Classic rule set. Official Digital Versions (Paid) Axis & Allies Free Download
While there is no "official" free version of the modern game for permanent download, you can legally play for free through community-driven open-source projects or by accessing vintage "abandonware" versions . Top Recommendation: TripleA (Open Source) If you are downloading the game for the
The most popular way to play for free is TripleA , an open-source engine that perfectly replicates the board game's rules. Top Recommendation: TripleA (Open Source) The most popular
If you are looking for the original 1990s PC versions, these are often classified as abandonware: