The game is well-optimized for modern hardware, but older systems must meet the following minimum and recommended benchmarks as of 2026: Specification Minimum Requirement Recommended Specification Windows 7 / 8 / 10 (latest service packs) Windows 10 (64-bit) Processor Intel Core 2 Duo or AMD Athlon 64 X2 Intel Core 2 Duo 2.4 GHz or AMD Athlon 64 X2 5600+ 2.8GHz Video

: The PC version requires a constant internet connection to play; it does not support an offline mode.

The game is managed exclusively through the Battle.net desktop app.

: The free version limits play to Act I (up to the Skeleton King), a level 13 cap, and restricted matchmaking.

: Click the "Install" button. The launcher will handle the download, patching, and final installation.

: Ensure the launcher remains open to automatically download the latest seasonal patches and performance optimizations. System Requirements

: While official documents state 25 GB, fresh installations from the Battle.net shop often result in a folder size of roughly 15-16 GB after optimization.