Many versions in the Minecraft launcher are labeled as "old_alpha", despite not all actually being from the Alpha development phase (though this may be due to a more general use of the software development term "alpha"). This term may refer to:
- Pre-classic, the first private development phase of Minecraft.
- Classic, originally named "Minecraft Alpha".
- Indev, where Minecraft was now "in development".
- Infdev, infinite world generation development.
- Alpha, the development phase of Minecraft preceding Beta.