As the player goes to higher and higher sectors, Necro Mutex is supposed to gradually become impossible. Unfortunately, user Kiddster didn't get the memo, and with a skillful and well honed playstyle has been thrashing tougher and tougher sectors without problem, recently beating sector 9998, the second last sector and the last "normal" sector. (Meaning, not an escape pod sector)
So to toughen up those final sectors, update 1.3.0 has made some changes.
Sectors 8000-8999 now either have the Low Ammo or No Ammo challenge.
Sectors 9000-9998 have been completely re-done, and now always have a shuggoid, cortex guardians, and the No Ammo challenge. That should make them more consistently difficulty.
The Electro Flamer Alt Fire has been modified. It now takes 0.25 seconds to power down, using ammo while it does. This doesn't make much difference when it's used in a continuous burst. However the "Tap 'n' Zap" strategy of just doing quick bursts now uses a bit more ammo, so it's more difficult to just charge through a sector occasionally tapping the alt fire to clear a path. "Tap 'n' Zap" is still useful, it just can't be used quite as much, especially on low ammo sectors.
Shuggoids and Cortex Guardians have gotten a hit point buff in earlier game sectors. They start out roughly four times tougher than they used to be, though in the upper sectors they still have the same hit points.
Shuggoids and Cortex Guardians also have some extra attacks now, firing positrons and muons respectively.
This update also includes a number of other minor tweaks and bug fixes. If any new bugs have been introduced, let me know in the discussion forum and I'll fix them asap.
Hope you enjoy the new update.