IndustrialCraft 2 Classic

IndustrialCraft2 Classic (or IC2 Classic for short) is an updated version of the pre-Experimental version of (from Minecraft 1.4.7). However, it has been extended with with features such as additional advanced machines, a Steam variant of the Nuclear Reactor, more advanced variants of the OD and OV Scanner, dedicated Battery Boxes, and a Nuclear Jetpack.

IndustrialCraft 2 Classic is also compatible with most addons to IC2 Experimental.