If you are looking for the original 1990s PC versions, these are often classified as abandonware:
Includes a live multiplayer lobby, play-by-email support, and AI opponents. Availability: Free forever for Windows, macOS, and Linux. Retro & Abandonware Options Axis & Allies Free Download
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. If you are looking for the original 1990s
You can find the 1998 Hasbro Interactive Axis and Allies for download or browser-based play. You can find the 1998 Hasbro Interactive Axis
Available on Steam (PC), Google Play (Android), and the Apple App Store (iPad).
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)
The most popular way to play for free is TripleA , an open-source engine that perfectly replicates the board game's rules.