For early versions of Minecraft, when using the default Minecraft Launcher, the options.txt file is incompatible and will cause the game to crash. To fix this, go into your .minecraft directory and either delete or rename the options.txt file (warning, completely deleting the file will cause your settings to reset across versions).

Minecraft Crashes on Launch

Official Hypixel Speedrunning Twitter

OverMC

Ammel

Creeper Dungeon

Shiverer

1.4.0

1.4.1

1.4.2

1.4.3

1.4.4

1.4.5

1.4.6

1.4.7 Glitched

Glitchless

Hardcore

Non-OOB

Version

Glitches?

Macintosh

Hypixel

Minecraft Custom Content

Penguin

Leelo

Nazwa	Manager
Minecraft Crashes on Launch przez Ammel	Ammel 3 months ago
Official Hypixel Speedrunning Twitter przez OverMC	OverMC 4 years ago