Since I've become interested in going through whatever Japanese PC Engine publications I can find for a better understanding of PCE history, and since I can read Japanese, I thought it might be nice for me to gather choice information in a thread. I don't know how long I'll really keep this up (a lot depends on how many interesting materials I can get my hands on), but it would be a shame not to share!
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PC Engine Fan - August 1993
Page 11
Previewing the Arcade Card, which is confirmed to be 18 megabits on the previous page, we see that the Arcade Card itself was originally designed ONLY for Duos and Super CD-ROM systems. The original plan for the old systems was to use an adapter that let you plug in both a 3.0 card and an Arcade Card. The adapter is still in development. The pictures drawn were created by the magazine staff as their own concept drawings.

The Arcade Card was slated for release in December of that year, at the price of 12,800 yen. "Arcade Card" was still a temporary name at that point.
Page 14
Konami says they are interested in the Arcade Card, but they can't say any more. The magazine writers say that they hope Martial Champion gets an ACD port.
Capcom says they have no plans to port SFII or Tenchi o Kurau II to the ACD.
Namco says the ACD looks nice, but there are no plans to port the arcade game Knuckleheads.
Page 15
The writers are just fantasizing about the possibilities of the ACD.
Page 48
This whole section is reader comments, and this page is about a recent topic of argument:
"Don't make the visual scenes the only selling point of the games!"
Lots of people wrote in, 10 fan letters were selected, and four developers each said their pieces about, essentially, the validity of digital comic books as games.
Hudson was one of the four developers, and even at this time, you can see them proclaiming their confidence in the genre.
At the end, the magazine proclaims their verdict: digital comic books are "innocent".
Page 72
Dracula X, now at 60% completion...Look at the huge-ass dude in the screenshot who got cut from the final game!

Page 96
PC Cocoron at 95%. Lots of screenshots. Sigh.
[direct translation]
The story is that the main character is trying to rescue Princess Lua from a Demon King. He gets more and more information about her as he beats the bosses which inhabit each area. The game is set in a "dream world" of five stages. You can play the stages in any order you like. You can even revisit stages. However, depending on the direction that you are moving, the enemy patterns will change.
Swim with the jump button and fight sharks head to head.
Slip around on ice and fight flying penguins.
There are flame-engulfed enemies in the lava stage.
You can put together different combinations of face, body, and arm parts. Each part has 8 varieties, each with different abilities and weights, so depending on how you combine them, your abilities and movement speed will change. When you beat a boss, you can change your character, so you can play as six different characters throughout the game.
Depending on the body you choose, you can fly.
Weight affects your jumping.
Your arm parts gather items to power you up.
With three types of parts, and 8 varieties of each, there are 512 total combinations!
Comical enemies like playing-card knights appear. This is a dream-world, after all.
(to be continued. Damn, this issue has more stuff than I was expecting.)