# Big Mech Energy Idle Wiki: Guides and Mechanics

You are humanity's last loyal defense AI, piloting a **Mech**. It **auto-fights** an endless stream of rogue machines. Kills drop **Scrap** and, rarely, **[Parts](/wiki/parts/)**. You spend Scrap to level your Chassis and wire looted Parts into **[MechMaxxing](/wiki/mechmaxxing/)**, the power graph at the heart of the Mech, to define how you fight. Each bigger Mech is held by an **[AI Overlord](/wiki/overlords/)**: beat it in a duel and you can **[Ascend](/wiki/ascension/)** into the body it was hoarding.

It's mostly idle, it fights and progresses on its own, but active play (MechMaxxing, Full Send, Maximum Effort, drone sorties) optimizes your run.

### Basics

[MechMaxxingMechMaxxing guide: wire Power from the Mech Core into attacks, stack boosters and tuners, and master the splitting, supercharge and stacking rules.](/wiki/mechmaxxing/)[Parts & WeightPart tiers from Nerfed to GOATED, rarity multipliers, affixes, the Weight budget, and when to scrap, upgrade or melt your spares.](/wiki/parts/)[CombatCombat guide: wave structure, bosses every 10th wave, Full Send, Maximum Effort, hull regen, the enrage ramp and wave navigation.](/wiki/combat/)[Damage TypesKinetic, energy and corrosive damage explained: which enemies resist or break to each, and how to read WEAK and RESIST tags in the combat log.](/wiki/damage-types/)[Reading the MathThe full damage formula: how tuners add, boosters multiply, Core taps split and sum, and how crit and fire rate are computed.](/wiki/reading-the-math/)### Codex

[The MechsAll 12 mech incarnations from Scrap-Bot to Dyson-Frame, shown as live firing models straight from the game.](/wiki/mechs/)[The EnemiesThe enemy codex: every rogue machine model with live in-game art, plus the palette, loadout and modifier grammar that builds each variant.](/wiki/enemies/)[OverlordsAll 11 AI Overlord duels: recommended waves, what each one unlocks, win and loss rules, re-fights and trophy minis. Spoilers follow.](/wiki/overlords/)[PetsPets guide: how drops work, leveling to 25, deploy rules, bonus stacking and the 11 gold overlord minis.](/wiki/pets/)### Progression

[AscensionAscension is the prestige loop: beat the overlord, upload into the next of 12 mechs, earn Cores and keep your parts, wiring and pets.](/wiki/ascension/)[DronesSalvage Drone Bay guide: strike sorties that run while you sleep, field bonuses, Escalation Tiers, Clearance Levels and repairs.](/wiki/drones/)[Training YardTraining Yard guide: obedience trials, kennels, yard levels, and the only way to train pets past level 10.](/wiki/training-yard/)### Industry

[The FoundryFoundry guide: fuse three duplicate parts into one of a higher tier, hit the heat strike for a bonus affix, and forge Unit and GOATED parts.](/wiki/foundry/)[The SmelterSmelter guide: melt spare parts into Alloy and buy permanent Weight, Storage and drone bay capacity.](/wiki/smelter/)[Supply LinesSupply Lines guide: link cleared segments into a rail network for up to 25 percent bonus Scrap, with loops, derailments and costs.](/wiki/supply-lines/)[Hostile TakeoverHostile Takeover guide: stake Scrap in MechCorp divisions, collect Components dividends, chase drifting yields and buy out divisions.](/wiki/hostile-takeover/)[Compute GridCompute Grid guide: run intrusions for Compute, buy CPU and Storage, and ease the booster stacking penalty with Lattice Conductance.](/wiki/compute-grid/)[DistrictsDistricts guide: house your citizens, staff the Factory, Lab and Arcade, and collect capped global bonuses from the city on your legs.](/wiki/districts/)[Star HarvestStar Harvest guide: launch 50 satellites, double the Mech Core, complete the Dyson swarm and reveal Reboot.](/wiki/star-harvest/)### Reference

[TerminologyThe canonical glossary for Big Mech Energy Idle: Mech, MechMaxxing, Parts, waves, overlords, Ascension and every minigame term.](/wiki/terminology/)[CurrenciesEvery currency explained: Scrap, Components, Cores, Alloy and Parts, what earns each one and what each one buys.](/wiki/currencies/)[SavingHow saves work: 15 second autosave, export and import codes, offline progress, and the BME1 save code format for fan tools.](/wiki/saving/)[TipsQuick tips for new pilots: focused early builds, Mech Core priority, overlord timing, drone sorties and save backups.](/wiki/tips/)