Screenshots
Watch trailer on Steam ↗Sylph
Softmax Foundries · Published by Softmax Foundries
Mostly Positive — 73% positive (15 reviews) · 7 achievements
Last updated 28 Sept 2026
Operate a spacecraft at the edge of a singularity. Use realistic orbital mechanics and Newtonian physics to explore a star system around a black hole and what lies beyond.
£5.10
£8.50Lowest price we've ever recorded
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Price history
Simulation · 2026 · More £5 - £15 games
About this game
Sylph is a first-person spaceflight simulation with realistic orbital mechanics, Newtonian physics, and ship systems management set in a star system orbiting a black hole. Explore one of the most detailed and accurate black hole simulations ever rendered in real time in interactive software. Schwarzschild geodesic ray tracing, gravity funnel, event horizon, and what lies beyond. Built on the Sylph engine, a bespoke engine built from the ground up with no boundaries or speed limits.
CORE FEATURES:
Open world and scenarios.
Docking mechanics with capture envelope.
Instant time skip down to the minute.
Realistic orbital mechanics. Sphere of influence transitions. Transfer planner and rendezvous solver.
Real time orbital telemetry computed from live state vectors.
Momentum-based 6DOF flight model. Each thruster enacts real Newtonian force on the craft.
10 holographic cockpit panels. Nothing is decorative.
Ship systems management with startup sequences, electrical load management, pump and valve operation. All independently modeled and derived from real physics. Failures are cascading and emerge from the simulation state.
Fully modeled closed loop expander-cycle bipropellant combustion. Rotational inertia, turbopump characteristic curves with flow-dependent degradation, cavitation modeling, turbulent flow losses, boost pump to turbopump series staging, line charge/drain dynamics, heat soak, regenerative cooling.
Independent lower thrust system with forward and aft modes. 12 individual RCS thrusters with rotation and linear control.
8 Autopilot programs operating through the physical thruster simulation.
Electrical simulation with state-of-charge and voltage sag, two independent generators, circuit breakers, power draw, proportional load sharing, and overload trip.
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10
- Processor: Intel Core i5-8600
- Memory: 16 GB RAM
- Graphics: NVIDIA GeForce GTX 1070
Recommended
- Requires a 64-bit processor and operating system
Supported Languages
*languages with full audio support
Latest news
Patch NotesOfficial
Sylph Hotfix 1.3.3
-Changes to DirectInput initialization that was causing choppy mouse freelook when no device was connected. Please connect HOTAS before launching.Read full article on Community Announcements (softmaxfoundries)Patch NotesOfficial
Sylph Hotfix 1.3.2
-Changes to Ship panel UI navigation input polling checks. Please bear with the multiple successive patches, update sizes are very small. Softmax Foundries is committed to improving the software.Read full article on Community Announcements (softmaxfoundries)Patch NotesOfficial
Sylph Hotfix 1.3.1
-Rework of input handling for ship panel UI navigation. Improves consistency and responsiveness for both keyboard and HOTAS input.Read full article on Community Announcements (softmaxfoundries)Patch NotesOfficial
Sylph Update 1.3
-Added native HOTAS support. Functions as a separate input layer from mouse and keyboard. Bindable in the \ menu. Proportional input for RCS maneuvering, and throttles are absolute position. Freelook, ship panels and menu UI navigation are bindable. Some ship functions can be mapped to dedicated buttons. -Added a screen-sampled reflective post processing effect-HUD menu has been merged into CONFIG in the \ Menu. Compass is now a screen overlay in TOOLS-Replaced RCS thruster diagram in the GPC panel with a scale diagram of actual ship geometry.-Removed LOGS from the DATA section of the \ menu.-Adjusted ship panel saturation so that settings above 100% have a visible change. -Minor UI changesNote: Changes to system status messages and reference pages were applied in a previous patch but not documented.Read full article on Community Announcements (softmaxfoundries)Patch NotesOfficial
Sylph Update 1.2
Visual upgrades of the ship, ship panels, and celestial bodies-New fuel cell system as a power source. Replaces the MPS generator. Can be used during time skip-Changes to HIBERNATE menu to more clearly show requirements and state, and integration with the fuel cell system-Added cross-feed between APU and RCS tanks, and removed RCS external fill-Renamed EXTERNAL systems to AUXILIARY -Moved AUXILIARY to new overhead panel-Performance optimizationsRead full article on Community Announcements (softmaxfoundries)
