GregTech New Horizons, often shortened to GTNH, is a long-running questing modpack for Minecraft 1.7.10 centred on GregTech, with IndustrialCraft 2 and hundreds of other mods rebalanced into one huge progression. Its voltage tiers structure the whole game, moving from steam power through LV, MV, HV and far beyond, so each new tier is a hard-earned gate. Sounds tied to those milestones circulate in the community as shorthand for progress, shared in let's plays, base tours and Discord clips whenever someone finally breaks into a new electrical age.