DevilutionX is open source, reverse engineered version of Diablo game (not included) by Blizzard Entertainment (1997). The Amiga port was created by Artur Jarosik and Marlon Beijer. ASM & AMMX optimization by Samuel Devulder. It is based on https://github.com/diasurgical/devilutionX contributed by various authors.

DevilutionX.lha

If you don’t own a legal copy of Diablo game you can try Shareware version:
DevilutionX-Shareware.lha