compressedblocks-1.11.2-3.3.1-alpha25.jar is an alpha file of the Minecraft mod CB 2: All The Things, made for Minecraft 1.11.2. It was published on May 30, 2017 and is 0.6 MB in size. Pre-release builds can contain bugs — back up your world before installing. For the full description, screenshots and every other version, visit the CB 2: All The Things mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
