| In 2018 the IC2 developer Chocohead called a build of 2 April 2011 the oldest public release of the original IndustrialCraft still available, and wrote that the mod's actual start was some time in February 2011. | post | Dev blog |
| Chocohead dates the first public beta of IndustrialCraft² to 29 August 2011, and calls it the first key overhaul: cables went from whole blocks that ticked once a second, because the energy code was slow, to smaller tiered cables, with large additions and changes to the old content. | post | Dev blog |
| Alblaka posted IC² 1.106, for Minecraft 1.3.2, on 16 September 2012, with a new recipe that builds the nuclear reactor from three Nuclear Chambers. Writing in 2018, Chocohead said IC² carried on largely along the same track from its first beta until Experimental, apart from a reactor overhaul for the 1.3 update. | post | Dev blog |
| Chocohead dates IndustrialCraft² Experimental to August 2013: a partial rework of recipes, textures and tiering that removed features such as Refined Iron. He wrote that divisive changes like these, and the energy net being largely disabled, helped usage decline over time. | post | Dev blog |
| Chocohead wrote in 2018 that for many players IC2 Experimental was the only IndustrialCraft they remembered or had played, that the modpack FTB Infinity Evolved brought it to people who otherwise wouldn't have used it, and that earlier players remembered the older versions from packs such as Tekkit Classic and FTB Ultimate. | post | Dev blog |
| IndustrialCraft² kept IC1's energy units, cables, Generator, Macerator and electric furnace, all on the IC wiki by spring 2011 and all on its 2012 IC2 pages, and rebuilt how energy moves. Announcing IC², Alblaka wrote that a fellow modder was reworking the energy code; in 2018 the IC2 developer Chocohead described IC1's cables as whole blocks that ticked once a second, replaced in IC2 by smaller tiered cables. Tiered cables, packet sizes and transformers appear on the IC wiki's 2012 pages and in none of its 2011 revisions read here. | post | Wiki |