- Code:
http://www.minecraftforum.net/news/214-want-to-play-18-early-heres-how/
Just download a fresh copy of 1.7.3 and switch out the minecraft.jar file from this site.
I'm cruising around the 1.8 world right now on single player creative.
EDIT: Biomes are HUGE! Cobwebs/Vines are awesome! Animated chests are boss! Melons!
Died my 1st night by an Enderman. :/