Video Game Designer & Composer
Designer summary:
  • Studied Video Game Design at Skövde Vocational University
  • Intern for about a year at GURU Games
    • Level design, mechanics, events, sound/music implementation
  • Half a year of studies in each of...
    - Unreal Engine 4
    - Unity 5
    - Game Maker Studio
  • Teaches scripting in Unity C# for beginners at the University
  • Git, Plastic SCM
Composer summary:
I'm a diverse composer who specifies in cinematic and orchestral music and has previously worked on games such as the horror game Medusa’s Labyrinth (Steam) and first-person puzzle platformer Magnetic: Cage Closed (Steam, XBOX One). I'm also used to working in both FMOD and Wwise as well as implementing my music in Unity in C#.
  • Uses Logic Pro X
  • Specializes in cinematic music
  • Studied Video Game Music at Skövde University for three years.
My personality in singular words:
* Ambitious
* Dedicated
* Honest
​* Social
* Calm
* Positive
* Loyal
​* Good listener

Game design

Defenders of D.R.E.A.M. (2017)

An isometric cooperative shooter for up to four players. Work together, fight enemies and solve puzzles. I contributed with level design, some 3D assets (the ghosts, some props and one of the weapons), some basic scripting in C#  and the music. Made in Unity 5 by myself and five classmates over the course of eight weeks.

Platfarmer (2016)
​

A very short metroidvania-esque video game developed together with two classmates in Game Maker Studio. I've made most of the level design, the writing, some programming as well as the music and voice acting.

Made with Game Maker.

Super Awesome Man (2016)

A Match 3-game where you fight bosses. The boss takes damage once the special powers (fire, ice, lightning) reaches the bottom. Developed during two weeks at school by a small team.

Made with Game Maker.

Composer

Medusa's Labyrinth (2016)

Medusa's Labyrinth is a stealth horror game set in ancient Greece developed by Guru Games for PC. I was the sole composer for this game.

Magnetic: Cage Closed (2015)

A puzzle/platformer developed by Guru Games for PC and XBOX One. I composed the music in collaboration with Philip Nordqvist.

Osynligt Våld (2016)​

An independent short movie in Swedish where I was one of two composers.
Directed by Mikaela Engman.

 VGM-remixes

Harmony of a Hunter Returns (2021)

A fan album dedicated to the Nintendo game series Metroid. Released by Shinesparkers.
A highly praised album with many collaborating artists.

Roles: Assistant Director, Arranger, Performer, Composer.

Harmony of Heroes: Final Smash (2014)

A fan album dedicated to the Nintendo game series Super Smash Bros. Released by Shinesparkers.

Highly praised album with many collaborating artists.

"The first track is by Sebastian Mårtensson, [...] (the) track is at times mysterious, playful and epic, and Mårtensson's orchestrations do a great job of realizing these elements." - VGM Online

Harmony of Heroes (2014)

A fan album dedicated to the Nintendo game series Super Smash Bros. Released by Shinesparkers.

Highly praised album with many collaborating artists.
​
"A Fan Album as Epic as  Smash Bros. Itself" - Kotaku

"[...] Sebastian Mårtensson and Joel Sandberg bring a wistful feeling to the beautiful and meditative 'The Last Cake (Butter Building)' " - VGM Online

Harmony of a Hunter: 101% Run

Harmony of a Hunter
Fan albums dedicated to the Nintendo game series Metroid. Released by Shinesparkers in 2011 & 2012.

Highly praised albums with many collaborating artists.
Downloads: