2001 — 2026

Every patch, every season, every source.

A complete, cited timeline of MU Online — from the closed alpha in South Korea to the current season. Each entry links back to the archived patch note or announcement it came from.

Start at Season 0 Browse all seasons

releases tracked: 78
changelog entries: 602
cited sources: 490
years of history: 25

The timeline

Grouped by era. Sub-parts are listed in release order.

Documented changes per year

Season 0— view combined overview
2001—05
- Season 012 Feb 2001 — 17 Aug 2005159 entries · 75 patches
Season 1— view combined overview
2005—06
- Season 117 Aug 2005 — 29 Aug 200626 entries · 8 patches
Season 2— view combined overview
2006—07
- Season 229 Aug 2006 — 6 Dec 200731 entries · 7 patches
Season 3— view combined overview
2007—08
- Season 36 Dec 2007 — 26 Feb 20087 entries
- Season 3+26 Feb 2008 — 26 Aug 20085 entries · 1 patches
Season 4— view combined overview
2008—09
- Season 426 Aug 2008 — 2 Apr 200911 entries · 3 patches
- Season 4.52 Apr 2009 — 27 Aug 20095 entries · 1 patches
Season 5— view combined overview
2009—10
- Season 5 Part 127 Aug 2009 — 27 Oct 20095 entries
- Season 5 Part 227 Oct 2009 — 4 Feb 20104 entries
- Season 5 Part 34 Feb 2010 — 27 Apr 20104 entries
- Season 5 Part 427 Apr 2010 — 7 Oct 20105 entries
Season 6— view combined overview
2010—11
- Season 6 Part 17 Oct 2010 — 3 Mar 20115 entries · 1 patches
- Season 6 Part 23 Mar 2011 — 25 Aug 20119 entries · 2 patches
- Season 6 Part 325 Aug 2011 — 21 Nov 20111 entries
eX700— view combined overview
2011—12
- eX70021 Nov 2011 — 29 Mar 20125 entries
- eX70129 Mar 2012 — 13 Jun 20124 entries
- eX70213 Jun 2012 — 27 Nov 20124 entries
Season 8— view combined overview
2012—13
- Season 8 Part 127 Nov 2012 — 16 Apr 20138 entries · 1 patches
- Season 8 Part 216 Apr 2013 — 30 Jul 20134 entries
- Season 8 Part 330 Jul 2013 — 10 Dec 20134 entries · 1 patches
Season 9— view combined overview
2013—14
- Season 9 Part 110 Dec 2013 — 22 Apr 201416 entries · 2 patches
Season X— view combined overview
2014—15
- Season X Part 119 Aug 2014 — 16 Dec 20148 entries · 2 patches
- Season X Part 216 Dec 2014 — 21 May 20157 entries · 1 patches
- Season X Part 321 May 2015 — 21 Oct 20155 entries · 2 patches
Season 11— view combined overview
2015—16
- Season 11 Part 1-121 Oct 2015 — 5 Nov 20154 entries
- Season 11 Part 1-25 Nov 2015 — 17 May 20164 entries
- Season 11 Part 2-117 May 2016 — 9 Jun 20164 entries
- Season 11 Part 2-29 Jun 2016 — 1 Nov 20166 entries
Season 12— view combined overview
2016—17
- Season 12 Part 1-11 Nov 2016 — 17 Nov 20164 entries
- Season 12 Part 1-217 Nov 2016 — 23 May 20176 entries
- Season 12 Part 223 May 2017 — 24 Oct 20178 entries
Season 13— view combined overview
2017—18
- Season 13 Part 1-124 Oct 2017 — 14 Nov 20176 entries
- Season 13 Part 1-214 Nov 2017 — 16 May 20183 entries
- Season 13 Part 2-116 May 2018 — 7 Jun 20184 entries
- Season 13 Part 2-27 Jun 2018 — 16 Oct 20183 entries
Season 14— view combined overview
2018—19
- Season 14 Part 1-116 Oct 2018 — 29 Nov 20187 entries
- Season 14 Part 1-229 Nov 2018 — 21 May 20199 entries
- Season 14 Part 2-121 May 2019 — 11 Jun 20197 entries
- Season 14 Part 2-211 Jun 2019 — 24 Sep 20193 entries
Season 15— view combined overview
2019—20
- Season 15 Part 1-124 Sep 2019 — 17 Oct 20193 entries
- Season 15 Part 1-217 Oct 2019 — 5 Nov 201911 entries
- Season 15 Part 1-35 Nov 2019 — 21 Apr 20207 entries
- Season 15 Part 2-121 Apr 2020 — 11 May 20205 entries
- Season 15 Part 2-211 May 2020 — 15 Sep 20207 entries
Season 16— view combined overview
2020—21
- Season 16 Part 1-115 Sep 2020 — 6 Oct 20202 entries
- Season 16 Part 1-26 Oct 2020 — 27 Oct 202011 entries
- Season 16 Part 1-327 Oct 2020 — 13 Apr 20219 entries
- Season 16 Part 2-113 Apr 2021 — 4 May 20213 entries
- Season 16 Part 2-24 May 2021 — 28 Sep 20215 entries
Season 17— view combined overview
2021—22
- Season 17 Part 1-128 Sep 2021 — 19 Oct 20214 entries
- Season 17 Part 1-219 Oct 2021 — 9 Nov 20217 entries
- Season 17 Part 1-39 Nov 2021 — 19 Apr 20228 entries
- Season 17 Part 2-119 Apr 2022 — 10 May 20223 entries
- Season 17 Part 2-210 May 2022 — 27 Sep 20224 entries
Season 18— view combined overview
2022—23
- Season 18 Part 1-127 Sep 2022 — 20 Oct 20222 entries
- Season 18 Part 1-220 Oct 2022 — 8 Nov 20227 entries
- Season 18 Part 1-38 Nov 2022 — 18 Apr 20237 entries
- Season 18 Part 2-118 Apr 2023 — 18 May 20236 entries
- Season 18 Part 2-218 May 2023 — 19 Sep 20233 entries
Season 19— view combined overview
2023—24
- Season 19 Part 1-119 Sep 2023 — 12 Oct 20231 entries
- Season 19 Part 1-212 Oct 2023 — 1 Nov 20233 entries
- Season 19 Part 1-31 Nov 2023 — 30 Apr 20245 entries
- Season 19 Part 2-130 Apr 2024 — 14 May 20241 entries
- Season 19 Part 2-214 May 2024 — 4 Jun 20244 entries
- Season 19 Part 2-34 Jun 2024 — 24 Sep 20245 entries · 1 patches
Season 20— view combined overview
2024—25
- Season 20 Part 1-124 Sep 2024 — 15 Oct 20242 entries
- Season 20 Part 1-215 Oct 2024 — 5 Nov 20247 entries
- Season 20 Part 1-35 Nov 2024 — 22 Apr 20254 entries
- Season 20 Part 2-122 Apr 2025 — 13 May 20251 entries
- Season 20 Part 2-213 May 2025 — 29 May 20253 entries
- Season 20 Part 2-329 May 2025 — 30 Sep 20253 entries
Season 21— view combined overview
2025—26
- Season 21 Part 1-130 Sep 2025 — 21 Oct 20253 entries
- Season 21 Part 1-221 Oct 2025 — 11 Nov 202511 entries
- Season 21 Part 1-311 Nov 2025 — 21 Apr 20263 entries
- Season 21 Part 2-121 Apr 2026 — 12 May 20262 entries
- Season 21 Part 2-212 May 2026 — 9 Jun 20265 entries
- Season 21 Part 2-39 Jun 2026 — Sep 20264 entries
Season 22— view combined overview
2026Current
- Season 22 Part 1-1Sep 2026 — present1 entries