Mastema: Out of Hell is a Action, Adventure, Casual game from Oscar Celestini with a 60% positive Steam review signal. Indie Lantern indexes it for players browsing by single-player.

Game snapshot
- Developer
- Oscar Celestini
- Release year
- 2017
- Playtime
- Varies by player
- Price
- $4.99
- Review signal
- 60% positive
Screenshots






System requirements
PC
- Minimum
- OS *: Windows 7
Processor: Intel Core i5-4440 (or equivalent)
Memory: 2 GB RAM
Graphics: nVidia 320M or higher, or Radeon 7000 or higher, or Intel HD 3000
DirectX: Version 9.0c
Storage: 60 MB available space
From Steam reviews
Review notes
Mastema: Out of Hell is worth a closer look if you want pixel art, boss rush, strong atmosphere, and controller friendly.
Best for players who want pixel art, strong atmosphere, emotional story, and boss rush.
pixel-art
SettingThe visual language is pixel-led or deliberately retro.
boss-rush
Play styleA major part of the game is learning and beating standout fights.
strong-atmosphere
ToneThe mood, place, and presentation carry a lot of the experience.
controller-friendly
FitController, gamepad, or Steam Deck play comes up as a plus.
emotional-story
ToneThe story is framed as affecting rather than just plot-heavy.
deckbuilding
Play styleCard choices, deck shape, and synergies matter.
replayable
FitThe structure gives reasons to return rather than finish once.
exploration
Play styleThe draw is moving through spaces, discovering details, and learning the world.
Steam review snapshots
The gameplay is simplistic but challenging enough to where you can enjoy it while not wanting to break your controller.The sprite work is AMAZING, thats actually why I bought the game was just for the retro graphics but it really does…The spritework is well done, as you platform and fight your way through plenty of challenging levels and bosses with a variety…The sense of accomplishment after defeating a boss is one of the game’s strongest emotional payoffs, particularly given the hostile nature of…Why it fits
Check it if you want action, adventure filtered by single-player.
Who might skip it
Research further on Steam if you need verified accessibility details, exact playtime, or current system requirements.