While many mods exist for the sake of giving a different gameplay experience, there are others whose only interest is to say “Oh man, look at this insane thing I can make this game do!!” Technical achievement won’t interest player, but it it can be impressive in its own way: making things bigger, faster, stronger, or just proving you can do the unexpected for its own sake. In this roundup, let’s look at some technically impressive or technically noteworthy games.

Sonic Delta 40Mb (AKA Sonic Delta Next)
Submitted by Neto

Why put your file size in the name of your hack? Because this game is big. It’s very big. How big is it? It combines all stages, special stages, and characters from Sonic 1, Sonic 2, Sonic 3, and Sonic & Knuckles into one massive 37 Zone odyssey. The hack uses bank switching to press itself into a format that Genesis standards can allow, some custom sound drivers, and the Sonic & Knuckles engine by way of Sonic 3’s save system. That save system will prove extremely valuable when you put three hours in, and see you’ve only reached Zone 24. Only reached Zone 24.

Beyond the expected character choices, you can select the co-op team of Knuckles & Tails to trek from Green Hill to Sky Sanctuary. The game claims to have followed the logical progression of the emeralds, letting you collect them in Sonic 1 & 2, but staying true to Knuckles stealing them in 3 (sadly, I can’t confirm since I went for the novel Knuckles & Tails playthrough). In a rather unusual choice, this beta prioritizes alpha and beta versions of Sonic 2 stages and names, and includes Wood Zone, Dust Hill Zone, and Hidden Palace Zone among others. The only place to be wary is the stage select cheat, which caused the game to crash when I attempted to load certain levels, often by trying to put characters on incompatible stages (such as Knuckles in S&K Death Egg Zone), but also when I just tried to select a stage normally.

To myself as a non-developer, the impressive feat is just the scale of it all. This is marathon Sonic, a game to occupy most of a day if you let it. Even if its technical achievements don’t do much for you, having those four landmark games stitched together into a single contiguous experience gives a whole era of gaming a gravitas it doesn’t have when separate. It’s not more than the sum of its parts, only because that sum in itself is already strong.

DOOM in Sonic Mania
Submitted by TheStoneBanana

In the realm of getting DOOM to play on every device and in every context known to man, DOOM in Sonic Mania adds an additional menu choice from the Sonic Mania main menu that… just lets you play DOOM. Yeah. DOOM, the 1993 shooter. In Sonic Mania. With controller support. That’s… kind of it. I don’t want to downplay the personal amusement I get playing DOOM from within Sonic Mania itself, but it does exactly what it says it does, and it seems to do it well. Soon as I made my menu selection, I was running around boxy 3D environments blasting demons in the face with a shotgun.

That said, your results may vary, and not just because it’s a shooter that’s older than Sonic 3. The controls feel pretty good on a gamepad, but the limits of Sonic Mania’s button inputs mean concessions had to be made. There’s no mouse support, you’ll have to toggle between strafing and turning, and changing weapons require button combinations. You’ll also need a legitimate copy of DOOM, such as Ultimate Doom on Steam, so you can snag the WAD and put it in the mod’s root folder. If you don’t, you’ll be restricted to the game’s included freeware WAD which will not support custom WADs. On the other hand, if you do, it’ll load in a nifty bonus WAD that replaces Doom Guy’s sprites with Sonic’s face and cartoony gloved hands.

I was unable to test adding other WADs such as Doom II or Chex Quest, but they do appear to be supported.

Sonic Mania J2ME
Submitted by Iso Kilo

So this one requires a bit of clarification. J2ME, or Java 2 Platform Micro Edition, is a Java platform that a number of phone games run on. No, not games on your iPhone or Android. Old flip phones. The kind that used your number pad as the controller. During the years I owned a an old color screen Nokia, I bought and played a handful of… generally terrible games, including a port of Sonic 1 that could, at best, be described as functional.

Sonic Mania J2ME doesn’t make many modifications from the original, but it does show off what can be done to this specific version of the game, such as sprite and music replacement. Marble Zone has Lava Reef music, and Sprint Yard Zone has a few Studiopolis designs.

I personally like this, and I don’t expect many others to. It’s an effort to poke at a really esoteric version of Sonic and pick it apart. It’s just… it’s going to be weird to play. Keep your expectations low. The sprite replacement in this version isn’t thorough, and the game it’s built off of is… it’s bad. It’s a bad but still playable version of Sonic 1. The midi music is grating and will just stop after a loop or two, and there are no sound effects. Sonic’s sprite rotation will regularly glitch until he’s just running backwards and upside-down while descending small slopes. Many animations are linked to framerate, and to quote the hack’s description, “Limit to 30 FPS for a smooth but tolerable experience. Limit to 15 FPS for correct object and animation speeds.” And none of this is the hack’s doing, that’s just the nature of its source material. If you play this, do so for the proof of concept and accept that it’s doing what it can with the tools it has.