I have Eclipse 4.4 on my Windows 7. I got the following error when trying to install Google Plugin:
Cannot complete the install because one or more required items could not be found.
Software being installed: Google Plugin for Eclipse 4.3 3.5.1.v201312301723-rel-r43 (com.google.gdt.eclipse.suite.e43.feature.feature.group 3.5.1.v201312301723-rel-r43)
Missing requirement: Google Eclipse 4.2 Platform Plugin 3.5.1.v201312301723-rel-r43 (com.google.gdt.eclipse.platform.e42 3.5.1.v201312301723-rel-r43)
requires 'bundle org.eclipse.core.runtime [3.8.0,3.10.0)' but it could not be found
Cannot satisfy dependency:
From: Google Plugin for Eclipse 4.3 3.5.1.v201312301723-rel-r43 (com.google.gdt.eclipse.suite.e43.feature.feature.group 3.5.1.v201312301723-rel-r43)
To: com.google.gdt.eclipse.platform.e42 [3.5.1.v201312301723-rel-r43]
Install the latest version of the Google plugin (-rel43) into Kepler. Then get Luna and manually copy all features and plugins with com.google.* from the kepler installation to the Luna installation. Just worked fine for me.