# Big Mech Energy Idle > A free browser idle game. One loyal defense AI auto-battles the machine > uprising while you wire salvaged parts into its power graph, duel 11 AI > Overlords and upload into 12 ever-bigger war-frames. No account, no > download, no purchases; saves live in the player's browser. Facts: single-player, deterministic simulation, offline progress, documented save format for fan tools (see the Saving page). Built by lifeingray. Community: Discord, linked from every page. Every page below also exists as HTML at the same path without the .md suffix. ## Pages - [FAQ](/faq.md) - [About](/about.md) - [Updates](/updates.md) - [Big Mech Energy Idle Wiki: Guides and Mechanics](/wiki.md) - [MechMaxxing](/wiki/mechmaxxing.md) - [Parts & Weight](/wiki/parts.md) - [Combat](/wiki/combat.md) - [Damage Types](/wiki/damage-types.md) - [Reading the Math](/wiki/reading-the-math.md) - [The Mechs](/wiki/mechs.md) - [The Enemies](/wiki/enemies.md) - [Overlords](/wiki/overlords.md) - [Pets](/wiki/pets.md) - [Ascension](/wiki/ascension.md) - [Drones](/wiki/drones.md) - [Training Yard](/wiki/training-yard.md) - [The Foundry](/wiki/foundry.md) - [The Smelter](/wiki/smelter.md) - [Supply Lines](/wiki/supply-lines.md) - [Hostile Takeover](/wiki/hostile-takeover.md) - [Compute Grid](/wiki/compute-grid.md) - [Districts](/wiki/districts.md) - [Star Harvest](/wiki/star-harvest.md) - [Terminology](/wiki/terminology.md) - [Currencies](/wiki/currencies.md) - [Saving](/wiki/saving.md) - [Tips](/wiki/tips.md)