Progression Guide

Early Game (Fuel Pump → Combine)

1. Fuel Pump — upgrade early to increase fuel per pump.
2. Auto Pump — highest priority unlock; automates collection.
3. Combine — merge fuel batches before plot expansion.
4. First plot expansion — make room for Acid Pump alongside existing machines.

Mid Game (Acid Pump → Extractor)

1. Acid Pump — strong mid-game income boost through acid treatment.
2. Drill — pair with Reactor upgrades for raw fuel extraction.
3. Reactor — core mid-game machine; upgrade in bulk (10× or 100×).
4. Extractor — unlock after Reactor is stable.
5. Expand plot every time you unlock a new machine tier.

Late Game (Fuel Refinery → Volcano)

1. Fuel Refinery — essential before your first prestige.
2. Tesla Coil — expensive but scales well post-prestige.
3. Orb Reactor — post-prestige investment for extreme output.
4. Volcano — long-term endgame goal; requires significant plot space.

Progression Milestones

• The loop accelerates dramatically once Auto Pump and Combine are online.
• Focus on automation before cosmetic upgrades or excessive plot expansion.
• Each new machine tier should feel like a noticeable income jump — if not, upgrade the previous tier more.
• Use update1 (2× Fuel XP) when grinding machine levels for faster upgrades.