Hero Siege

What makes Hero Siege worth tracking is not a quirk of structure but sheer depth of time. From Season 1 on 2016-08-15 to Season 10 on 2026-07-14, we carry 26 seasons spanning roughly 9.9 years — the third-longest observation window among the 13 games we track, behind only Path of Exile (12.7 years) and Diablo III (11.9 years). Measured across the 25 intervals between consecutive season starts, the median is 120 days — longer than the 92-day median across all 216 intervals we track. With Diablo Immortal at an extreme 28 days and Dwarven Realms short at 70, Hero Siege sits toward the slow end of this catalog. The two eras differ sharply, though: the classic era ran a 139-day median against the reboot era's 93, meaning the game actually sped up after relaunching.

Read the season numbers carefully, because they have restarted twice. The original game ran Season 1 (2016-08) through Season 18 (2023-01); then the "Hero Siege 2.0" rebuild on 2023-10-02 reset the count, picking up again at Season 2. The result is a genuine paradox: Season 18 (2023-01-24) is *older* than Season 2 (2024-01-12). You can see how we handle it directly in the listing — each entry carries its era in the display name, so "Season 10 (Classic Era)" sits at 2020-07-21 while "Season 10 (Reboot Era)" sits at 2026-07-14, the same number appearing twice six years apart. Sorting runs on actual start date rather than season number, so the order never inverts. One more thing: classic-era Seasons 15 and 17 have no announcement at all. That is not a collection failure on our part — those numbers were simply never used, and we leave the gap visible rather than papering over it. The reward model also diverges from its peers. Rather than climbing battle pass tiers, each season drops entire new classes, acts, uber bosses, and season mechanics — Chaos Pillars in Season 7, the Incarnation Tree and Ether Tree in Season 9, dual trait trees in Season 10. It is the direct inverse of Diablo Immortal's 40-tier reward track.

Do not rely on automated collection alone for this game. The developer's Steam news API stopped updating after its 2026-05-11 entry and never returned Season 10, which launched on 2026-07-14 — we filled that gap by hand after confirming the Steam announcement post does exist. Because the cadence runs long — a 120-day median — checking the developer's official channels once a quarter is enough to stay current. That is exactly what we do, and we would rather say plainly that this page's freshness depends on that manual check than imply the automation covers it.

Laid out in order, the reboot-era intervals ran 70, 77, 70, 117, 93, 85, 98, 203, and 101 days. Most cluster between 70 and 101 — and then Season 8 sticks out at 203, running from 2025-09-12 all the way to 2026-04-03, better than half a year. The larger hole sits at the era boundary: 353 days separate classic Season 18 (2023-01-24) from reboot Season 2 (2024-01-12), the longest gap in this game and the longest anywhere in our catalog. For most of a year during the 2.0 rebuild, no new season opened at all. The practical read: this schedule is fairly regular most of the time, but when it slips, it slips hard. The broader trend runs toward openness — the developer has steadily moved paid content behind the free line, unlocking the Samurai, Paladin, Amazon, Demon Slayer, Demon Spawn, and Shaman classes in Season 9 and Acts 8 and 9 in Season 10. The sourcing caveat matters more here than for most games. The sixteen classic-era seasons carry a start date but no confirmed end date. This is precisely why we measure cadence as the interval between consecutive starts rather than as season length — doing so lets those sixteen records count rather than stranding them. Their start dates are still substitutions, though: the notice publication date standing in for an unannounced launch time. Those dates mark when the post went up, not when the season opened; read them with up to a day of slack.

A good match if you like pixel-art roguelike texture and prefer runs you can finish in a sitting, and especially if trying an entirely new class each season is what pulls you back. Where Diablo Immortal is the light option on this list and Dwarven Realms the brutal one, Hero Siege is a third axis: a new toy every time.