Anything older than 1.6 seems to crash upon loading. This is frustrating becuase there are old adventure maps from the 1.2 days I and a small community following still enjoy. I attached a photo of the error code it gives me. Thank you.
-AliensTookMe
MC-182622
Older versions no longer run
Resolved
Invalid
0
We do not provide support for old versions of the game.
This issue happens due to the fact that you started 1.6 in the same folder as you have installed a modern version of Minecraft in. It is heavily recommended to use separate game directories for separate versions of the game, since the versions may interfere with each other otherwise.