One of the easier missable achievements in Mixtape is the Grunge Metal Alchemist trophy, which requires players to create Slater’s hidden “Ultimate Slushie” recipe during the slushie-making section.
The problem is that the actual recipe is only hinted at later in the game, so many players end up guessing random combinations and missing the achievement completely during their first playthrough.
Thankfully, the recipe itself is actually pretty simple once you know the correct ingredients.
Mixtape Slushie Recipe – Unlock Grunge Metal Alchemist
During the slushie-making chapter, you need to combine four specific flavors in the correct mix.
The required ingredients are:
- Blue Crush
- Bubblegum
- Orange
- Lime
Once all four are combined together, the achievement unlocks immediately.
Where the Recipe Is Hidden
Interestingly, the game does give players a clue about the combination later in the story.
Slater’s Ultimate Slushie recipe can be found written on the wall inside his room near the computer.
However, this happens after the actual slushie-making sequence, which is why so many players miss the achievement naturally.
If you already passed the chapter without the trophy, you can simply replay the chapter through chapter select and use the correct recipe there.
Tips for Getting the Achievement Easily
Double-Check Ingredients
Make sure you select all four required flavors exactly:
- Blue Crush
- Bubblegum
- Orange
- Lime
Missing even one ingredient prevents the trophy from unlocking.
Use Chapter Select if Needed
If you already completed the game, replaying the specific chapter is much faster than restarting the entire story.
Do Not Overthink the Order
The important part is the ingredient combination itself rather than complicated timing or gameplay mechanics.
The Ultimate Slushie achievement is one of those fun little hidden details that fits Mixtape’s nostalgic atmosphere perfectly. The game quietly hides the recipe clue later in Slater’s room, rewarding players who pay attention to environmental details and character spaces.
Thankfully, once you know the combination, the achievement is very easy to unlock.