Gurumin: A Monstrous Adventure is a fantastic Action-RPG featuring real-time combat, 3D graphics, 90+ items, mini-games, multiple endings, a rocking soundtrack, 35+ hours of playtime, tons of fully voiced characters by an all-star cast of voice actors, and more!
All Reviews:
Very Positive (215) - 93% of the 215 user reviews for this game are positive.
Release Date:
Mar 30, 2015

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December 21, 2017

Happy Holidays From Mastiff - Loads of Sales and Promotions!


Grab a cup of hot coco and cozy up in front of the warm glow of your screen because the Steam Winter Sale is live!

From now through January 4 at 10:00am PST unwrap the holiday savings and pick up the critically-acclaimed action-RPG, Gurumin: A Monstrous Adventure and other action-packed titles from Mastiff like Heavy Fire: Shattered Spear, Heavy Fire: Afghanistan, and Reload.

You can also pick up all three shooters in the Heavy Fire + Reload Triple Pack at an even bigger discount!

You've been good all year long, so treat yourself, or send any of these games as a gift to those special people on your "nice" list!

Don't miss out! These jolly good prices are only valid up until January 2 at 10:00am PST!


If you're looking for some RPG action on the go, join Parin and her monster pals in Gurumin 3D: A Monstrous Adventure, which will be on sale for 60% off on the Nintendo eShop on Nintendo 3DS™ across PAL-supported territories (EU) starting December 31 and running through January 14! You can purchase the game directly from your 3DS or by clicking HERE!

Can't get enough Gurumin? Head over to the Theme Shop on your 3DS. There you'll find several Gurumin themes waiting to decorate your home screen. Each theme features unique art, game folders, and music straight from the game!


For you Nintendo Switch owners out there, Mastiff also just released Party Planet, a compilation of 30 party-games for up to 4 players. It's the perfect gaming compliment to any holiday or New Year's Eve party, and it's fun for players of all ages and skill levels! Pick it up today from GameStop,
EB Games, or from the Nintendo eShop on Nintendo Switch!


If you're looking for some solid throwbacks, Mastiff's End-of-Year Warehouse Clearance Sale is currently underway on PSN! Act fast! Supplies are limited!

• Save 50% on La Pucelle: Tactics
• Save 67% on Dirt Jockey


...and don't miss a gaming beat! Join the newly launched Mastiff Newsletter to stay up to date on upcoming releases, sales, giveaways, and more!

Wishing you a Happy Holiday & a Happy New Year! We'll see you in 2018.
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“With an all-star voice cast and an overall wonderful gameplay experience, I heartily recommend Gurumin: A Monstrous Adventure[.]”
96% – Worth Playing

“It’s rare for a game to provide such a simple, wonderful experience like Gurumin: A Monstrous Adventure.”
9/10 – Game Podunk

“…hallmarks of Nihon Falcom games include responsive controls and tight, old-school gameplay, however they do also excel in creating rich, inviting worlds… Gurumin bears the standard hallmarks with pride.”
4.75/5 – Got Game

About This Game

Gurumin: A Monstrous Adventure is a fantastic Action-RPG from leading Japanese developer Falcom (Developers of “Ys” and “Zwei” among other classics) featuring real-time combat, stunning 3D graphics, tons of fully voiced characters and mini-games , 90+ items, multiple endings, a rocking soundtrack, 35+ hours of playtime, and more.

Originally released outside Japan on Sony’s PSP®, Mastiff is proud to bring a fully localized and updated version of Gurumin: A Monstrous Adventure to Windows and to offer it through Steam with a full set of Steam specific features including Achievements, Trading Cards, Big Picture and Cloud Save.

The Story

Gurumin stars Parin, a strong-willed girl sent to live with her grandfather in a small mining town. Parin soon discovers an invisible monster village hidden behind her home. She is quickly drawn into a fight between the village’s friendly monster residents and the Phantoms, evil monsters that want to destroy them. Learning of a weapon hidden underneath the village that she alone is fit to wield, Parin embarks on a quest to stop the Phantoms and make the world right.

Play From Your Couch


  • 30 stages of non-linear game play
  • 23 non-player characters, 48 unique enemies, and more than 90 items to collect
  • Brilliantly diabolical dungeons, traps, puzzles and boss encounters
  • Mini-games galore!
  • 5 difficulty levels
  • Hidden characters, modes, and other secrets
  • Supports Windows XP, 7 and 8 at high resolution (up to 1920x1080) and with modern Anti-aliasing (up to 8X MSAA)
  • Full Steam support including: Achievements, Steam Cloud, Big Picture mode, and...
  • Beautiful Steam Trading Cards

An All Star Cast

  • Amber Hood as Parin
  • Tara Strong – Cream/Mosby
  • Justin Shenkarow as Puku/Prince
  • Dee (Bradley) Baker as Rocko/Digby
  • Robin Atkin Downes – Pierre/Doug
  • Michael Gough – Hyperbolic/Giga
  • Steve Blum – Motoro/Bob
  • Quinton Flynn – Roger/Poco

System Requirements

    • OS: Windows XP
    • Processor: Pentium III 800 MHz
    • Memory: 1 GB RAM
    • Graphics: 64 MB VRAM, 3D accelerator compatible w/ DirectX 9.0c
    • DirectX: Version 9.0c
    • Storage: 2 GB available space
    • Sound Card: Compatible with DirectX 9.0c
    • OS: Windows XP, Vista, 7
    • Processor: Pentium III 1.0 GHz or higher
    • Memory: 2 GB RAM
    • Graphics: 64 MB VRAM, 3D accelerator compatible w/ DirectX 9.0c
    • DirectX: Version 9.0c
    • Storage: 2 GB available space
    • Sound Card: Compatible with DirectX 9.0c
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