The Arduboy is an open-source, credit-card-sized handheld built on the Arduino platform. It’s all about that 8-bit era feel—roughly, you know, a step above those black-and-white LCD Tetris handhelds. The project actually started as a way to promote Arduino, something Arduino fans cooked up themselves. It later hit Kickstarter, became a proper product, and turned into a geek toy. As more people bought it, they did a bunch of collabs and even put out an enhanced Arduboy FX with more preloaded games and USB-C link play… It looks commercial, but the thing is fundamentally open source. You can buy an ATmega32u4 chip and, by mooching off companies like JLC, solder one together yourself. No need to buy the official version—especially since the official one has been out of stock and getting pricier lately.

Happy Mid-Autumn, everyone 🎑! This time I got my hands on a rather unusual handheld. The community calls it the “underwear machine,” because the thing is shaped like a pair of briefs. What makes it special is that it takes actual GBA game cartridges, and the design is clearly a bit of a nod to the GBA. It’s quite cheap — under 280 yuan. I don’t know what the processor is; probably a Rockchip. The OS is a heavily customized Linux. The biggest visual highlight is the front panel: a single piece of glass, and it looks genuinely nice. Sadly, that’s where the good parts end.

The Trimui Smart is a pretty unusual early handheld. Unlike the big “shanzhai” makers who lean on the open-source community to supply a “usable system,” Trimui has always built its own custom system, and it actually works well. Most people know the later Trimui Smart Pro, the handheld that claims it can play PSP — though not comfortably — and whose real selling point is killer standby time (the perk of a custom system is deep optimization), plus the Trimui Brick that carried on the Smart Pro’s traits, and so on… I’ve actually used both the Trimui Smart Pro and the Trimui Brick, and sold them later. Not because the system was bad — mainly because the build quality was so poor. Burrs everywhere, and the buttons are stiff as hell… But today we’re not talking about those two. We’re talking about the Trimui Smart, the first product in the line.

Back in May last year, I noticed the ROG Ally X handheld was not only in stock on JD.com, but the price was back to normal, and it even qualified for the national subsidy. Basically, a machine that originally cost over 6000 RMB ended up discounted by a little over 1000, so I got it for under 5000. The reason JD.com gives you is the “national subsidy,” but in reality you don’t need to bind any qualification for this subsidy—you just need your delivery address to be in Shanghai. A victory for the “Shanghai lords,” you could say. Naturally, I asked a fellow townsman bigshot in Shanghai to receive and buy it for me, and successfully got my hands on this handheld. A lot of people probably want to know: I’m a SteamDeck shill, so why did I buy ASUS’s handheld? How should you choose between it and the SteamDeck? I think I can explain it briefly with these points: It’s a Windows handheld, so it can play Windows-exclusive games (Galgame) It’s the only Windows handheld I know of that’s continuously optimizing power efficiency It’s the best Windows handheld I know of when it comes to self-made power control software At the time (2025), it had the largest battery capacity among Windows handhelds Some might bring up the ROG Ally + big battery mod, which has basically the same performance, but the biggest difference with the ROG Ally X is its 24GB of native RAM. The change that big memory brings is that you can allocate a large amount of VRAM to games, especially those poorly optimized ones that all need lots of VRAM. And from my observation, the root cause of stuttering when the SteamDeck runs those badly optimized games is often insufficient memory, and the ROG Ally X can clearly improve that.

I already had two x86 handhelds on hand, but there was still a reason to buy a third. At first I just wanted something to play PS2 on. My old device was a Retroid Pocket 4, an Android handheld with a MediaTek Dimensity 1100 — just barely enough for PS2, but some games still drop frames. What’s worse is that PS2 emulator on Android: it hasn’t been updated in ages and looks like it’s on its way to being completely dead. So I started looking for a replacement. Then I came across all those high-end Android retro handhelds — Aya Neo, Ayn Odin, Retroid Pocket 5/6. The budget for these things has climbed to around 2,500 RMB. Honestly, I really don’t like Android handhelds. For one, the OS itself is bloated for a gaming device. For another, Android has input latency when playing emulated games. A lot of people probably can’t feel it, but if you compare side by side it’s obvious. So isn’t there some slightly smaller handheld that runs Linux and can handle PS2 emulation? That’s when I spotted a batch of brand-new AYN Loki Max units on Xianyu. After thinking it over, I went for it.

Preface: Retro handhelds (open-source handhelds) have been kind of popular these past few years. I’ve bought and sold a few myself. Honestly, before this I was just following the crowd — I barely played any games on them, it was more about messing with the hardware. Lately I’ve been thinking about settling down and actually playing something seriously, so I started wondering whether I should put together a “handheld” that genuinely fits my needs. So after a whole bunch of tinkering, I ended up with a result I’m reasonably happy with. I figured I’d write it up and share it with anyone who’s had the same idea, in the hope it helps or gives some inspiration.

It’s been a long time since this happened, but I kept going back and forth on whether to write it down. Same as my experience two years ago when I got dragged into a quarantine facility for over ten days — I really wanted to write about it, and it would be meaningful, but it’s easy to get burned, to invite unnecessary trouble. Last year I really wanted to write it out and vent, but as time passed I forgot about it. Today I happened to remember, and figured I should write it after all — the whole process is not just surreal but ironic, and it also illustrates the state of most of the industry from the side, and it even calls back to some of my experiences from years ago. To avoid unnecessary trouble, I won’t mention the product’s name in this whole piece, and I won’t comment too heavily on the product’s R&D and management strategy. I’ll try to just lay out the facts plainly and let everyone judge for themselves. At the end I’ll give my short take. Of course, this is just a long dream I had last year. All the plot comes from the story in the dream, not reality. Please don’t match it to anyone real, and don’t make weird guesses.

The Playdate is a handheld made and sold by Panic, the studio behind the well-known game Firewatch — or rather, that game is exactly what gave the team the starting capital to build this thing. As a handheld, the Playdate has a grayscale reflective display that’s supposedly on par with e-ink (no backlight), a small enough size, a yellow shell, and a button layout reminiscent of retro handhelds. It looks very refined at first glance, but the real standout is the “crank” on the side that tucks in and pulls out. This kind of control device is probably the first I’ve seen in the “handheld” category.

I’ve been playing fewer galgames lately, but that doesn’t mean I’ve left the scene — I’ve just played a bunch of stuff and haven’t felt like writing about any of it. And since that last post, I’ve upgraded my “gal machine” too: swapped it out for a GPD Win Mini, which I’ve been using ever since. This little thing is honestly better than I expected. As a “gal game player,” I can’t find anything more suitable right now. I’ve said before that if I ever bought another GPD product I’d eat shit, but this little guy has somehow become GPD’s best product to date, and the “gal machine” I’d recommend most. So, well — time to eat.

I keep seeing posts like this online: “Looking for a device to play Gal.” “Which tablet is good for eroge?” “This handheld is great, a perfect eroge-dedicated machine.” … Sometimes I’m confused too. The “Galgame” category has been a dying industry for ages, so why does it look like there are still so many fans online, willing to spend real money on a pricey dedicated device just for it? Actually, long-time readers of my blog probably know that about 10+ years ago I wrote a similar article. I briefly laid out some of my own views back then; some hold up now, some were incomplete. After all these years I’ve built up a fair amount of galgame experience and cycled through a lot of devices for playing them. Maybe we should sit down and talk about this again, and share some of my experience.