Heroes 3, probably still most successful game in the series, spiritual successor of Heroes 2, after all - it's based on the same engine. There also exists Heroes 3 HD by Ubisoft but it's missing both Add-Ons, Armagedon Blade and Shadow of Death - on the other hand, Ubisoft released it also as an Android game. Developed by 3DO and published by NWC. Among with Heroes 4, it have the best map editors which warranted thousands of maps and campaigns created. Recommended mod here is ERA2, which is "WoGified", meaning that it contains WoG, in a way. WoG 3.59 is still along the way but there is plenty of other fan mods, like Horn of Abyss. If you would like just the vanilla game, certainly install HD mod by baratorch. This one is already included in ERA2. Should mention also VCMI, which is not a mod but a new engine, with everything written a new, reusing game assets, adding new ones and having version for Android too.

HoTA World Championship 04 March 2021
Armageddon’s Blade → Maker of Sorrows 29 January 2021
Fanstratics - The Fifth Newsletter! 07 January 2021
Upcoming interview with Marcus Pregent 20 December 2020
Fanstratics - The Fourth Newsletter! 02 December 2020
Heroes of Might & Magic IV - Resolution Mod by Verokster 22 November 2020
Fanstratics - The Third Newsletter! 08 November 2020
ERA3 Released! 25 October 2020
Fanstratics - The Second Newsletter! 03 October 2020
Fanstratics - A First Newsletter! 01 September 2020
Short News 20' - August 16 16 August 2020
Armageddon’s Blade → Seeking Armageddon 10 August 2020
Armageddon's Blade → Shadows of the Forest 10 August 2020
Fanstratics - A Spiritual Successor from the lead game designer of Heroes of Might and Magic III 30 July 2020
Short News 20' - July 22 23 July 2020
Armageddon’s Blade → Catherine’s Charge 20 July 2020
HotA 1.6.0 released 09 January 2020
Heroes of Might and Magic III HD+ Mod receives epic update 20 November 2019
Short News - 19' March2April 30 April 2019
HotA 1.5.4 - Bug fix release 29 December 2018