Compound Interest CD Key
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Lowest Steam price ever: 5.99$ — 2026-10-19 — Current low
Compound Interest description
Compound Interest
You paid attention in chemistry. Time for that to pay off. The periodic table isn’t decoration—it’s your entire strategy layer. All 118 elements are cards you collect, deploy, and combine. Fill rows and columns for escalating bonuses, and watch the table light up as you move from tapping Hydrogen to mass‑producing Plutonium. If you’ve ever looked at the periodic table and thought, “I could optimize that,” this is your game.
Dynamic fusions, endless paths. Forget memorized recipes. Any combination of elements whose atomic numbers sum to a valid target is a legal fusion. Two Hydrogens make Helium. Three Lithiums yield Fluorine. There are thousands of valid routes—the game rewards clever planning. If you’ve got a stockpile of Carbon, you’ll find a way to spend it. The fusion chamber doesn’t care how you get there.
Real compounds, real synergies. Craft Water, Ethanol, Steel, TNT, Diamond—over 60 molecular compounds with authentic formulas. Each compound carries synergy tags such as [Oxide], [Organic], [Crystal], and [Fuel]. Slot compounds that share tags into your loadout and the bonuses stack hard. This is where theorycrafting lives: your compound loadout is your build, and the best configurations push numbers beyond what you imagined.
Decay, isotopes, and value over time. Heavier elements above Polonium are radioactive and decay through real chains. Uranium cascades through Thorium, Radium, Radon, and more, finally stabilizing as Lead. Each step fires an energy burst and yields a usable element—one Uranium card can become a time‑bomb of value.
Prestige and permanence. When you hit a wall, trigger a Big Bang. Your elements reset, but your research, discovered recipes, and Cosmic Dust endure as a prestige currency that unlocks permanent multipliers. Each cycle starts faster, goes further, and earns dust exponentially more. The question isn’t if you should prestige—it’s when.
Automation and progress that lasts. Unlock automation through the research tree—auto‑click, auto‑fuse, auto‑synthesize, auto‑compound, and eventually auto‑prestige. Start hands‑on, then lean back as your atomic factory hums. You can close the game and return later to a Welcome Back screen filled with scientific notation.
More features at a glance. All 118 elements with unique stats, rarity, and real‑world traits; thousands of fusion paths; 60+ real formulas; compound loadouts and catalyst bays; decay chains with measurable value; reaction events (Combustion, Explosions, Crystallization, Corrosion); a Discovery Journal with chemistry facts for every compound; offline progress up to 24 hours; isotope variants and big numbers that scale in scientific notation.