How to easily get the Supersonic and Immortal achievements

Directions

Here's how you can guarantee Immortal and Supersonic in a single playthrough. This strategy serves to get around the autosave that occurs each time you die and respawn, by taking advantage of the amount of control the game gives you over your save files in the main menu. It's effectively a "segmented" approach, where you can decide on where segments begin and end and retry each one as many times as you like, and only the last try will be counted.

I wasn't even willing to attempt the Immortal achievement before figuring this out, because there are so many instakills near the end of the game that I'd end up playing through almost the whole game many times, but this was risk-free and reasonably fast loads made it not too painful.

Please note, it's recommended to play through the game casually not long before this, so you know the map layout, where to go to progress, and any easy item locations you may want to grab along the way.

Also, this does NOT apply to Definitive Edition's One Life mode or the associated Unhinged achievement. (I think the very existence of that achievement and its distinction from Immortal implies that the devs are OK with you taking an approach like this.)

To get started:

Make sure you have at least two save slots open, preferably next to each other.

Start a new game and skip the prologue.

Pause and exit to the main menu.

Copy the save you just made into a new slot.

Reload either slot and start progressing. Try not to die, and don't dally!

ANY time you want to "lock in" your progress (or simply avoid watching a long cutscene again), follow these steps:

Save the game.

Check your death count in the pause menu to make sure it's 0. (If it's not, instead follow the steps below to "reset.")

Quit out to the main menu.

Copy the current save (the one with a higher time shown), and overwrite the other one with it.

Reload either slot and continue.Remember, if you don't do this and then die, you'll have to go back to the last time you did it.

When you inevitably die, or when you decide you want to "reset" to the last time you "locked in," follow these steps:

Quit out to the main menu.

Compare the times shown on the two slots you're using.

If they're exactly the same, the game didn't save any new progress or deaths, so reload either slot and continue.

If they're NOT the same, copy the one with the lower time and overwrite the other one, then reload.This should set your deaths back to 0, and it should also reset your timer to where it was when you last locked in.

If you ever copy over both saves with a death count that is not 0, you've lost your entire playthrough and have to reset to the beginning of the game.

You'll find that most of the game takes much less time when you don't count any failed attempts, making it much easier to finish it within the 3-hour limit, but you can also feel free to reset any time you think you're taking too long, took a bad route through a non-linear section, or went for a powerup or side path and then decided it wasn't worth it. If you forget which way to go, lock in before trying a path, and then reset if it was the wrong one. Just keep an eye on the timer to gauge how long you have left.

For reference, in my playthrough, I entered the Ginso Tree after the half-hour mark, and still made it to Misty Woods before the one hour mark. I collected about half the Life Cells and a good number of Ability Cells and Spirit Light, managing to max out the attack branch of the ability tree so I didn't feel underpowered in Mount Horu. My final time was just over two hours. If you're on this pace, you have plenty of time.

Another option is to combine this playthrough with the Elite achievement and avoid using any ability points; this saves you time because you don't have to go for Ability Cells or Spirit Light at all (if you get one, you can reset), but I think it makes things much more frustrating in late game, partly by forcing you to reset more often. I personally opted to do a separate playthrough for that achievement, in which I was allowed to die and take as long as I wanted.

Source: https://steamcommunity.com/sharedfiles/filedetails/?id=3047463893					

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