Mattias Holmgren - Invidious

Mattias Holmgren

What happens when a pro composer hears your favorite game music?
I’m Mattias Holmgren (aka Gelhein), a Swedish producer and designer with 25+ years of industry experience. On this channel, I take deep-dive reactions into Game OSTs, breaking down the composition, sound design, and emotional impact from a professional perspective.

Beyond the music, I’m here to guide YOU in music production and creativity. I share the tricks I’ve learned over two decades to help the next generation of creative producers.

🚀 Grab my FREE Creative Booster Guide: www.morningdewmedia.com
📬 Business Inquiries: morningdewmedia@gmail.com

Join me at the intersection of games, music, and design. Subscribe for a deeper look at the sounds you love!

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2:22:26

Genshin Impact Sumeru OST Listening Event (Composer Reacts)

Mattias Holmgren

Shared 2 weeks ago

14K views

2:13:17

I Was NOT Ready For Blue Prince (Composer Reacts LIVE)

Mattias Holmgren

Shared 2 weeks ago

646 views

2:00:30

Stellar Blade OST Listening Event (Composer Reaction)

Mattias Holmgren

Shared 3 weeks ago

5.2K views

2:00:15

OST Listening Stream: Discord Picks & Taking Requests (Game Music)

Mattias Holmgren

Shared 3 weeks ago

2.9K views

2:13:45

Honkai: Star Rail OST (Svah Sanishyu) Composer Reaction

Mattias Holmgren

Shared 1 month ago

10K views

1:47:33

Blue Prince OST listening event and composer reaction

Mattias Holmgren

Shared 1 month ago

935 views

2:17:12

Genshin Impact Character Trailers OST Reaction part1 (Mondstadt, Liyue, Inazuma)

Mattias Holmgren

Shared 1 month ago

12K views

1:05:59

Video Game Music Piano Medley For You

Mattias Holmgren

Shared 1 month ago

532 views

1:49:38

Mewgenics OST Listening Event & Composer Reaction (Pt2)

Mattias Holmgren

Shared 1 month ago

20K views

2:20:26

Chill Community Livestream, taking requests & playing live!

Mattias Holmgren

Shared 1 month ago

2.3K views

2:10:22

Honkai: Star Rail OST Listening Event & Composer Reaction

Mattias Holmgren

Shared 1 month ago

24K views

2:12:08

Mewgenics OST Listening Event & Composer Reaction

Mattias Holmgren

Shared 1 month ago

44K views

3:22:25

Genshin’s OST is Goated, but is the Gameplay? (PS5 2026)

Mattias Holmgren

Shared 1 month ago

12K views

2:04:02

Genshin Impact OST: Composer Reacting to the Live Orchestra

Mattias Holmgren

Shared 2 months ago

39K views

2:27:58

Genshin Impact OST Listening Event & Composer Reaction (pt 2)

Mattias Holmgren

Shared 2 months ago

35K views

2:31:30

Genshin Impact OST Listening Event & Composer Reaction

Mattias Holmgren

Shared 2 months ago

71K views

2:35:57

Death Stranding 2 OST Reaction & Listening Event (composer analysis)

Mattias Holmgren

Shared 2 months ago

8.3K views

2:15:43

Monster Hunter Wilds OST Reaction: Arkveld Medley, Gogmazios Medley (community picks)

Mattias Holmgren

Shared 2 months ago

5.5K views

1:57:53

A Composer Dissects Rain World: Listening Party & Analysis

Mattias Holmgren

Shared 3 months ago

3.7K views

1:23:11

Let's Listen to Celeste OST p2

Mattias Holmgren

Shared 3 months ago

2.7K views

1:39:33

Celeste OST: Composer reacts to most requested soundtrack

Mattias Holmgren

Shared 3 months ago

5.9K views

1:24:15

Grimm Troupe OST: composer reacts to the Hollow Knight DLC

Mattias Holmgren

Shared 3 months ago

5.9K views

3:20:51

DELTARUNE Chapter 4 OST Listening Party (composer reacts)

Mattias Holmgren

Shared 3 months ago

36K views

1:47:53

SKYRIM OST: Composer reacts to your favourite soundtrack

Mattias Holmgren

Shared 3 months ago

6.9K views

3:12:21

We Listen to VGM and Play Games (Community Stream)

Mattias Holmgren

Shared 4 months ago

1.3K views

2:07:45

Minecraft OST Reaction: The Genius of Volume Beta (Tycho & Minimalism)

Mattias Holmgren

Shared 4 months ago

16K views

1:47:36

DELTARUNE Chapter 3 OST Reaction & Listening Party

Mattias Holmgren

Shared 4 months ago

24K views

1:53:13

Tribal, Tech & Orchestra: Why Horizon's Music is Groundbreaking (Composer Reaction)

Mattias Holmgren

Shared 4 months ago

1.8K views

2:26:41

DELTARUNE Chapter 2 OST Reaction | What Inspired Toby Fox?

Mattias Holmgren

Shared 4 months ago

28K views

2:00:04

DELTARUNE OST: How Toby Fox evolved (Composer Reaction & Analysis)

Mattias Holmgren

Shared 4 months ago

36K views

1:22:01

The Finals OST: Composer reacts to all Season Trailers

Mattias Holmgren

Shared 4 months ago

9.2K views

2:27:52

MONSTER HUNTER WILDS OST: Composer Reacts to MIGHTY Scores

Mattias Holmgren

Shared 4 months ago

11K views

2:18:05

UNDERTALE OST: Composer Reacts to YOUR Most Requested Songs LIVE

Mattias Holmgren

Shared 4 months ago

68K views

2:55:21

COMPOSER'S First Time Hearing MONSTER HUNTER WORLD OST (Blind Reaction)

Mattias Holmgren

Shared 5 months ago

18K views

2:38:59

Blasphemous OST: Composer Reaction and analysis

Mattias Holmgren

Shared 5 months ago

7.4K views

1:51:21

Composer Reacts: The Genius of Minecraft OST (Nostalgia Trip)

Mattias Holmgren

Shared 5 months ago

91K views

2:34:36

Nightreign OST Reaction Part 2 | Why the Music feels so Magical (Composer Analysis)

Mattias Holmgren

Shared 5 months ago

3.2K views

2:40:47

Baldur's Gate 3 OST is DRAMATIC | Composer Reaction & Analysis (Part 2)

Mattias Holmgren

Shared 5 months ago

4.4K views

2:28:33

Baldur's Gate 3 OST: Composer Reaction & Analysis

Mattias Holmgren

Shared 5 months ago

8.3K views

2:28:56

Hades II OST rhythms are MAGICAL (Composer Reaction & Analysis)

Mattias Holmgren

Shared 5 months ago

13K views

2:31:21

Dark Souls 3 OST Listening Event (Composer Reaction & Analysis)

Mattias Holmgren

Shared 6 months ago

38K views

2:47:32

ELDEN RING Nightreign OST Listening Event (Composer Reaction & Analysis)

Mattias Holmgren

Shared 6 months ago

41K views

1:39:58

Verso's Drafts Reaction (6 NEW Clair Obscur songs!)

Mattias Holmgren

Shared 6 months ago

7K views

42:14

Best Score And Music at Game Awards 2025 (composer Reaction)

Mattias Holmgren

Shared 6 months ago

2K views

24:41

I CAN'T BELIEVE IT! Clair Obscur Wins GOTY 2025!

Mattias Holmgren

Shared 6 months ago

2.8K views

2:41:52

Elden Ring OST: Composer Reaction & Analysis

Mattias Holmgren

Shared 6 months ago

24K views

2:05:05

Shadow Of The Erdtree OST Reaction & Analysis

Mattias Holmgren

Shared 6 months ago

25K views

2:24:21

Xenoblade Chronicles 2 Music BROKE ME... (Composer Reaction & analysis)

Mattias Holmgren

Shared 6 months ago

14K views

1:56:36

Composer Reacts & Plays: Clair Obscur Prologue (Lumière) | Part 1

Mattias Holmgren

Shared 7 months ago

5.4K views

2:10:16

Let's Listen to FINAL FANTASY OST, FF7 REMAKE and more (React & Quiz with special guest!)

Mattias Holmgren

Shared 7 months ago

5.2K views

2:09:20

Why Bloodborne’s Music is a Masterpiece (Part 2)

Mattias Holmgren

Shared 7 months ago

10K views

2:25:17

Why Bloodborne’s Music is a Masterpiece | Composer Analysis

Mattias Holmgren

Shared 7 months ago

30K views

1:02:48

The Arc Raiders OST (Composer Reaction)

Mattias Holmgren

Shared 7 months ago

18K views

2:53:21

Nier:Replicant OST Listening Party (composer reaction)

Mattias Holmgren

Shared 7 months ago

14K views

1:44:22

Composer plays Silksong: Moorwing boss & exploring Greymoor

Mattias Holmgren

Shared 7 months ago

621 views

2:10:29

Witcher 3 OST – Cozy Composer Reaction

Mattias Holmgren

Shared 7 months ago

18K views

2:55:05

Listening to Your Favourite Game Music P2 (composer reaction)

Mattias Holmgren

Shared 7 months ago

5.3K views

1:48:03

Listening to Your Favourite Game Music P1 (composer reaction)

Mattias Holmgren

Shared 8 months ago

5.7K views

2:20:47

Omnisphere 3 is HERE 👀

Mattias Holmgren

Shared 8 months ago

2.6K views

2:18:52

Ori and the Blind Forest OST (composer reaction & analysis)

Mattias Holmgren

Shared 8 months ago

2.3K views