Man, you call that HD when only the jagginess of the edges is gone without other enhancements in HD Mode of G-Darius in the compilation through upscaling? At least the other PS1 games that are ported to other modern platforms have remastered graphics whether they're standalone or part of the compilation. Even as an arcade shooter, the HD Mode should have REDONE graphics with true Hi-Res textures, various shaders and the explosion effects having Add/Screen type Alpha Blending. Raystorm HD already has remade graphics although something's off with the in-game aspect ratio and the remade graphics are not that great. The price is what turned many critics off the most as a result.
Recently, there was a PS1 emulation core in Retroarch that allows custom textures in PS1 games but until the recent time, having something like custom textures or hi-res textures on PS1 emulators is no easy feat due to the way the PS1 performs. The N64 emulators already allow that opportunity probably due to the fact that the N64 console has the RAM expansion stuff. Even the Dreamcast emulators have that same opportunity as well. The screenshots of the N64 and Dreamcast games on emulators I saw had the sharp looking textures with that mod. Perhaps, anyone can try having Hi-Res textures with the use of Beetle PSX HW core for Retroarch and there's even the Widescreen option in the emulators as well although not all games may look like that and there will or will not be inaccuracies depending on the setup. There are ways to make Hi-Res textures for Beetle PSX HW core.
I don't know if the HD port of G-Darius in the compilation is emulation-based or some sort but M2 surely specializes on the emulation quite well and especially for a 32-Bit console-era game like G-Darius which performs well in the compilation. The one in the compilation is based on the arcade version whether you choose HD Mode or Original Mode which is kind of like the Arcade Mode of various Cave arcade shooters on Xbox 360. The resolution is like extremely low, around 240p for those games but it's basically what the arcade version of those games is like originally.
Another game in the compilation is Darius Burst Another Chronicle EX+ which actually has its own additions like additional stages and additional music in Event Mode. It's the same repetitiveness as Chronicle Mode but Event Mode seems a little bit more reasonable like getting your score recorded for instance. The additional music that's exclusive to EX+ is what I anticipate the most upon hearing it from ZUNTATA's live stream of the compilation game and the music from the upcoming album CD being shown.
