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A modern tribute to the 1986 classic, The Sentinel.

Originally built by Geoff Crammond and published on 8-bit home computers in the late 1980's.

Pinnacle captures the ambience and mood of the original game while taking advantage of modern processing power.

As a teenager in the late 80s, I was profoundly influenced by The Sentinel and played it obsessively on my Commodore 64. 37 years later, I'm thrilled to present Pinnacle, a modern tribute to the original game. A reimagining that is faster paced and makes use of modern features like global illumination, volumetric fog and shadows while staying true to the game's original concepts.

I sincerely hope that players enjoy this as much as I enjoyed the original.

Immersive gameplay in a surreal world

Pinnacle is a game of energy, entropy and in many ways the cycle of life itself. Harness the energy around you, use it wisely, conserve it. Like the tangible world around us, energy is perpetual. It is never destroyed, it just changes form.

Absorb energy from the landscape

Trees serve as the basic unit of energy. Absorb them from the scenery when you're able to do so. You can only assimilate objects if the square upon which they rest is visible to you.

Gain altitude

Stack boulders, place a "synthoid" on top and teleport your consciousness into this new vessel. Reabsorb the shell and any boulders you left behind. Boulders are worth 2 energy units, a synthoid, 3.

Elude the Sentinel's watchful eye

When you find yourself caught in the Sentinel's gaze, it will leach away your life-force, scattering it across the terrain in the form of newborn trees. Move before it drains and kills you. Alternatively, hyperspace to a random location at the cost of 3 energy units and leaving your old vessel and any boulders behind.

Take the throne

When you have absorbed enough energy and gained enough altitude, absorb the Sentinel, claim its throne on the pinnacle and advance to the next world that awaits.

The Sentinel is not alone

As your voyage takes you into more challenging worlds, you'll have to grapple with additional sentries. Equally formidable as the Sentinel, they rotate in the reverse direction. Maintain a watchful eye on them and strategise your approach accordingly.

Download Pinnacle

Pinnacle is provided as is, completely free of charge, without any warranty or guarantee. Download the appropriate version for your operating system.

Pinnacle (Version Beta 1.0)

Download for Windows

Windows Defender will probably block Pinnacle from running as it's not from a verified publisher.

If you experience this, you can click 'More info' then 'Run anyway'. The file is perfectly safe and doesn't track any information or install anything to your system.

Pinnacle is a fun side project I provide free of charge. For this reason I don't pay Microsoft and Apple hundreds of dollars in yearly fees to join their developer programs. Unfortunately, this means end users can't install free software without being nagged.

MacOS Notarization

Mac Gatekeeper may initially block Pinnacle from running as it's not from the App Store.

If you experience this, right-click (or CTRL+click) on the .app file, select Open, you get the contextual menu to open up the app anyway. It should open normally after this.

Pinnacle is a fun side project I provide free of charge. For this reason I don't pay Microsoft and Apple hundreds of dollars in yearly fees to join their developer programs. Unfortunately, this means end users can't install free software without being nagged.

System Requirements

  • Windows 10, Linux 64bit or MacOS 10.13

  • Intel Core 2 Duo E8400 / AMD Athlon II X2 250

  • 4GB RAM

  • NVIDIA GeForce Series 8 or AMD Radeon HD 7000 series

  • Mouse and keyboard

  • 125MB storage

Made with Godot Engine

Originally released in 1986 by Geoff Crammond, The Sentinel, also known as The Sentry in the United States, was a pioneer in 3D graphics for home computers. It quickly became one of the highest rated games on the BBC Micro, ZX Spectrum and Commodore 64.

In the annals of video game history, certain titles stand out for their innovative gameplay, groundbreaking graphics, or compelling narratives. Among these is the 1986 game "The Sentinel", published as "The Senty" in the USA.

Developed by Geoff Crammond, a British game designer renowned for his work on the Grand Prix series, The Sentinel pushed the boundaries of what was possible on home computers at the time, offering a unique blend of strategy, atmosphere and tension that captivated players and critics alike.

For its time, The Sentinel was a revolutionary game. It was one of the first games to use solid 3D polygon graphics on home computers, a significant leap forward in an era when most games were text based, using 2D sprites.

Geoff developed a technique where rather than rendering a complete view in real time - impossible on 8-bit hardware - the camera would rotate a number of degrees at set intervals. The edge portion of the screen would be rendered as it came into view.

This mechanic was built into the game play and for the first time on home computers allowed for a truly immersive 3D gaming experience.

Further reading...

Find out more about the history of The Sentinel and it's author Geoff Crammond.


Wikipedia entry for The Sentinel.
The Sentinel is an extraordinary game by Fabrice Dubois.

2017 blog post by Fabrice Dubois. Includes screenshots from John Valentine's Zenith.
Amiga Magazine Rack.

Review by Commodore User magazine. January 1987. Also pictured above.
Your Commodore.

Review by Your Commodore magazine. January 1987. Also pictured above.
My Abandon Ware. Entry for The Sentry.

Source for the above Amiga screenshots.
Legendary Games Designers: Geoff Crammond

Article by Games Nostalgia covering Geoff Crammond's most popular games and career achievements.


Pinnacle is an independent fan creation and is provided free of charge and without warranty. Viperfish Media and John Pitchers have no association or affiliation with the original developers, publishers, or any other entities holding rights to the original work. This application shall not be disseminated via any channels that seek to gain profit from it.

Download Pinnacle

Available for free for Windows, Mac and Linux.