This content requires the base game Heat Signature on Steam in order to play.

All Reviews:
4 user reviews - Need more user reviews to generate a score
Release Date:
Sep 21, 2017

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Check out the entire The Defenestration Trilogy franchise on Steam

Downloadable Content

This content requires the base game Heat Signature on Steam in order to play.

Buy Heat Signature: Edition Upgrade


About This Content

This pack contains all the extras you get with the Supporter's Edition of Heat Signature, so you can buy it to upgrade to that edition.
  • Play through Heat Signature's development with 8 early prototypes from its 3.5 year development.
  • Watch 9 developer commentary videos showing and explaining its evolution: from drilling through hulls to liberating empires. (Total: 70 minutes)
  • Own the full soundtrack in 320kbps MP3 format. (19 tracks, 83 minutes)

On launching Heat Signature, you'll have a new option to open the folder containing all these extras.

Please note: the early prototypes are by definition unfinished versions of the game, so they have bugs.


1. Intro (John Halpart)

2. Quantum Immortality (John Halpart)
3. Trespasser (John Halpart)
4. Dawntempo (John Halpart)
5. Foundry Remix (John Halpart)
6. Grav9000 (John Halpart)
7. 2 Class (John Halpart)
8. The Other Side (John Halpart)
9. Distance (John Halpart)
10. Space Sonata (John Halpart)
11. Out of Shape part1 (John Halpart)
12. Full Cycle (John Halpart)
13. Places (John Halpart)
14. Out of Shape part2 (John Halpart)
15. Neutral Two (John Halpart)
16. Reflected (John Halpart)
17. Kaleidoscope (John Halpart)
18. Graviton (Christopher James Harvey)
19. Space Awe (Christopher James Harvey)

System Requirements

    • OS *: Windows 7
    • Processor: 1.7GHz dual-core CPU
    • Graphics: Intel HD 5000 or better (GeForce and Radeon tend to be better)
    • Storage: 5 GB available space
* Starting January 1st, 2024, the Steam Client will only support Windows 10 and later versions.

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