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Steam News5 June 20261mo ago

Minor Summation Serpent and Sieve Spider boss fixes

Sieve Spider now uses the correct number designs as follows: "spiky" numbers only for invincible numbers "glitched" numbers only for weakpoints (legs) NEW: "hatched" numbers instead of "spiky" for all sieve numbers.

Full notes

Full Zero Sum update

Read the full published notes in a cleaner layout. The original post stays linked below.

What changed

1 fix2 additions0 changes0 removals
  • Gameplay
  • Fixes
addednow uses the correct number designs as follows: "spiky" numbers only for invincible numbers "glitched" numbers only for weakpoints (legs) NEW: "hatched" numbers instead of "spiky" for all sieve numbers.
fixedfixed a bug, where under very specific circumstances it could happen, that the head became targetable even though some segments where still alive. Thanks to @agentimouton on Instagram for the bug report!
addedadded the missing hard mode feature, where the summation serpent is charging the player for 3.5s at double its current speed after a segment has been broken

Zero Sum changes

addednow uses the correct number designs as follows: "spiky" numbers only for invincible numbers "glitched" numbers only for weakpoints (legs) NEW: "hatched" numbers instead of "spiky" for all sieve numbers.
fixedfixed a bug, where under very specific circumstances it could happen, that the head became targetable even though some segments where still alive. Thanks to @agentimouton on Instagram for the bug report!
addedadded the missing hard mode feature, where the summation serpent is charging the player for 3.5s at double its current speed after a segment has been broken

Sieve Spider

  • now uses the correct number designs as follows:

    • "spiky" numbers only for invincible numbers

    • "glitched" numbers only for weakpoints (legs)

    • NEW: "hatched" numbers instead of "spiky" for all sieve numbers.

as before, in easy mode, sieve primes having an additional small effect to indicate that they are primes

Summation Serpent:

  • fixed a bug, where under very specific circumstances it could happen, that the head became targetable even though some segments where still alive. Thanks to @agentimouton on Instagram for the bug report!

  • added the missing hard mode feature, where the summation serpent is charging the player for 3.5s at double its current speed after a segment has been broken

Source

Steam News / 5 June 2026

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