Loadstar was a disk magazine for the Commodore 64 that lasted for 22 years! I’ve been put in charge of organizing its archives. From time to time I’ll present something interesting from its thousands of published items.

Even though I’ve been spending a lot of time working on the Loadstar project, I’m trying not to overwhelm this blog with items related to this Commodore 64 disk magazine. So for the time being I’m restricting myself to weekly Loadstar posts at most. Maybe on Wednesday? How would “Loadstar Lendsday” be as a name? Hm, not great. I’ll work on it.

This week I bring you one of the most polished games Loadstar published, Zorphon by Nick Peck, from issue 39. Here’s some demonstration video I recorded and posted to Youtube (13 minutes):

While he did have a few miscellaneous other items published on its disks, Nick Peck only ever made two games for Loadstar. Both are great, technically impressive, programmed entirely in machine code, and challenging. (The other is Paragon, from Issue 50.)

Zorphon is a space shooter in the vein of Gorf, where each stage offers different gameplay. Zorphon has three stages that loop, although there is an extra one, “Genesis,” that plays before the first loop, that’s only encountered at the beginning of the game.

You have your standard-issue spaceship that’s locked to the bottom of the screen, that can only move left and right, like the ships in Space Invaders, Galaxian and Galaga. This poses special problems in the stage that plays like Centipede: if one of the purple space bugs makes it down to your ship’s level it’s done for, because it’s not possible then to shoot or dodge it at that point, so it’s essential to ensure that doesn’t happen.

I played this game long ago, when it had just appeared in the magazine’s September 1987 issue, and even though it’s a fairly simple game, its quality has stayed with me all these years. There are different ways to represent moving objects on the Commodore 64. The most obvious, and smoothest, way is using its hardware sprites, but there are only eight of them. You could use sprite multiplexing to reuse them as the raster beam traces down the screen, but that poses certain limitations on the graphics and gameplay.

Zorphon instead chooses a different means of representing enemies, it draws them on the character map. That means that the attacking aliens can only be displayed on character grid boundaries, which is a drawback, but it takes the cap off of the number of foes the C64’s VIC-II chip can display. You also get free collision detection: just check the register at memory location $D01E (53278) to see if the sprite that represents the player’s ship comes in contact with any background graphics data. This method means the collision detection is pixel perfect, the flag isn’t set if the sprite overlaps empty portions of a character cell. This isn’t always desirable, but the ship in Zorphon is large and chunky, so mis-detected collisions are unlikely.

Zorphon is, of course, in the archive of Loadstar Compleat that I maintain, although admittedly it is $15 there. You could also play it on the Internet Archive’s emulation of it. That is a “cracked” version though, which I find funny because Loadstar is for the most part not copy-protected. It will offer you unlimited lives, which is also funny since it’s a score attack game, and running out of lives is the only way for it to end. I think Loadstar #39 is also available there somewhere, but I can’t seem to find it easily.

If you decide to try it, by however means, here’s some tips.

All the stages of Zorphon are made more challenging by your ship’s limited firepower, having only one shot onscreen at a time. If you miss your shot you’ll have to wait until the other one exits the screen to try again, and that can take two or three whole seconds. Getting into a rhythm of shooting at monsters helps a lot, especially in the first stage, which is all about finding that rhythm.

The first stage, Genesis, has two phases. The first end when you shoot enough of the red TIE-Fighter enemies, but to finish the second you must destroy all of the blue bouncing aliens within a limited number of passes. If you don’t get all of them in time, they’ll completely replenish, and if you fail at it again you’ll be sent back to the TIE-fighter phase!

The blue bouncing enemies are really hard to hit. I find it’s best to hang out at the left side of the screen and shoot the ones there. Every time they pass by, they distribute themselves again, and there will always be an enemy on the left side unless there’s only one left (which will move to the center of the screen).

Since Genesis cycles until you pass it, one way to get a good score is to purposely repeat it, letting the blue enemies reset and then fighting the TIE-fighter phase again. Once you know the patterns Genesis isn’t very hard, and can be easily farmed for points. It’s not a very exciting way to play though.

The second stage, Challenge, will be the end for many players. It’s the Centipede-like stage, but your shots do nothing to the mushrooms! Many of the enemies wipe out mushrooms when they pass over them, which will help you out a lot.

To finish Challenge, you must wipe out two complete waves of centipede aliens, and a few pairs of segments that come in between them. After the second wave spawns, clear the stage of centipede segments and you’ll progress.

The third stage, Attack, is really tough, and made harder by the fact that it’s so hard to get to it that you can’t practice it easily! Maybe getting better at it is a use for that infinite lives cheat on the Internet Archive version? Maybe! To finish it, I think you have to shoot enough of the bouncing asterisk enemies to pass it. Look out for the exploding bombs dropped by the flying saucers that come in from the side!

I don’t know remember if I’ve ever finished Attack and gotten to the last stage, but I seem to remember seeing a full loop at some point so I think I have. See if you can do it.

rodneylives