I’ve been playing DevilutionX in preparation for Fam plays since, while it does not have cheats per-se, you can move and copy save files (the path is probably in here).
Produced in version 1.5.3
My Save Files have the stash (Gillian) chock-full of goodies, both the Diablo (.sv) and Hellfire (.hsv) versions, although Hellfire reset everything and the save has more pages with items.
Hellfire brought extra spells, oils, the Monk class and 8 new levels.
If you’re using Windows you may find the Bobafett Hero Editor/Cheat Engine useful as well as other tools by Diasurgical.
Resources (courtesy of Mistral)
- Ladik MPQ Editor (this is an older version but it extracts well)
- Zezula MPQ Editor
- StormLib (what the MPQ Editors use)
- Ghast’s Groto (listfiles, required to know what files are named)