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Proto:Ultrakill
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This page details one or more prototype versions of Ultrakill.
2018 Dropbox Builds
On Ultrakill's 3rd anniversary (since development began), the official Twitter account for the game posted a Dropbox containing several builds of the game when it was still very early in development.
 | February 1, 2018 |
| March 19, 2018 |
| April 3, 2018 |
| May 24, 2018 |
| June 13, 2018 |
2020 Steam Builds
Hidden in the depths of the Steam servers, lies not just one, and not two, but several prototypes that predate the game's initial Early Access release by several months! Even though these builds came out only just a few months before the release, these builds still have their own quirks and differences that can be documented.[1]
| April 16, 2020 |
| April 18, 2020 |
| April 26, 2020 (1) |
| April 26, 2020 (2) |
| May 1, 2020 |
| May 12, 2020 |
| May 13, 2020 (1) |
| May 13, 2020 (2) |
| June 2, 2020 (Demo) |
| June 11, 2020 (Demo) |
| June 16, 2020 (Demo) |
