Imported from other Blizzard franchises
- Human 1 from Warcraft II. Here's how it sounds in Heroes. Was even more metal in Alpha.
- Human 2 from Warcraft II. Alpha version. Release version. This theme is largely only used on the Blackheart's Bay map, when Blackheart fires his cannons.
- The various Terran themes from StarCraft were introduced in two Starcraft-themed maps introduced together in Machines of War. The Braxis Holdout map also directly lifts one of the Zerg Themes. Each of them are nostalgic pieces for Starcraft veterans.
- Tracer has two; the first is nearly a carbon-copy of the cinematic intro of Overwatch. The second is fairly similar, but given a Heroes of the Storm-style rock rework. It combines the uplifting Overwatch theme with the epic orchestral metal and chanting that Heroes of the Storm is known for. The last 30 seconds have to be listened to. The latter theme has been repurposed as victory music for Hanamura and Volskaya Foundry, as well as a random main menu theme.
- Chromie, which starts with a cover of the Gnomeregan theme introduced to World of Warcraft in the Cataclysm expansion. After that, it switches to The Culling of Stratholme, a Wrath of the Lich King dungeon Chromie was prominently featured in. The Gnomeregan theme in particular is amazing. It gives a total makeover to a fairly silly theme, transforming it into this epic warchant.
- Samuro, from the Orc Victory theme from Warcraft III. Like all of Samuro, it's jam packed with nostalgia for Warcraft III players.
- Lucio, which is almost directly lifted from We Move Together As One (AKA his Speed Boost). Really builds up the hype for any Lucio fans coming in from Overwatch.
- Genji, from Overwatch, as well as the Dragons cinematic. Expanded upon and used for the Hanamura map. Not only was it finally some clean audio of the Dragons music, it's a pretty incredible piece by itself. The song incorporates the most famous part of the Requiem for a Dream theme, but doesn't overemphasize it. The singing in the background is gorgeous and ties the whole song together.
- D.Va, loosely based on Overwatch. It starts as a normal epicified song before breaking down into a pseudo-chiptune beat. It's one of the shorter themes, but that doesn't make it any less interesting.
- Stukov, largely original but ends with a cover of Funeral For a Hero from StarCraft: Brood War. The original was used for Stukov's death, and it has the sweeping, heart-wrenching quality to it. When the guitar kicks in, it coalesces to feel like a glorious tribute to a fallen commander. Knowing the context of the original song and Stukov's actual fate only makes the music more powerful.
- Garrosh, from the Horde themes within Cataclysm and Mists of Pandaria, the two expansions in which Garrosh was Warchief. The whole piece is imposing, hammering in Garrosh's personality.
- Ana, an epic guitar cover of Temple of Anubis in Overwatch. The Egyptian-styled music mixed with rock creates a great sound.
- Junkrat, from Junkertown and Junkrat and Roadhog's theme in Overwatch. Hearing a guitar cover of Junkertown is pretty sick, and the Junkrat and Roadhog theme now has some didgeridoos spliced into it, tying it back to them better.
- Medivh's original ethereal theme gets transformed into an epic march.
- Orphea's theme is an amzing ethereal piece.
- Dragon Shire map theme. It doesn't use any guitar, but instead has plenty of epic chanting. Alpha version.
- Chant, used as the queue theme for Brawl mode, and later the entire game. Later modified with, well, chanting.
- The final music of Volskaya Foundry is a new composition complete with Ominous Russian Chanting. The lyrics of the chorus roughly translate to "Volskaya protects all of us, she is a defender.", and the overall tone of the chanting (obligatory Autobots, Rock Out! aside) would not be out of place in a nationalistic Russian musical epic.
- "Heroes Defy", also known as "Rock Opera", which combines the sweeping orchestra and Latin chanting of Warcraft with the hard-hitting heavy metal instrumentation of Starcraft.