Spectrum Computing

The coloured fireworks appear when the base has been destroyed - well, it does on the version that you linked to.
Had fun playing the game by not blasting the radar bases - the danger level goes up and it takes to the end of level 4 for the RED ALERT message to appear - I blasted one base on purpose and two others by accident. The score still goes up for the missiles that explode on the cavern ceiling.

Pegaz wrote: ↑Sat Jul 14, 2018 10:28 am Excellent fix, great job R-Tape.
Penetrator is one of my favorite games and is now even more playable.

I should point out I can't remember where the patch came from. I did my own once but I think this one is by somebody else.

Here's the original tzx file with the fix applied.
Enjoy.
https://ufile.io/32vhm

Nice one! Thanks.

Having blasted 16 bases and returned home, the difficultly rating does get harder after level 11
Miss 2 radar tracking bases and it is Red Alert time and those missiles levitate in mid flight sometimes scroll towards the craft.

The bonus score doesn't get printed properly, it is shifted a character to the left. The score wraps around to zero, but I currently have 32 lives!

Loaded up the original game, and yes, it does require the fix - it makes it a lot more enjoyable to play.
Maybe the thrust or fire was left in to make the game harder, but it is a pain.

After a certain danger level, the missiles seem to be so erratic they seem to destroy each other a lot. Sometimes made the game easier..!