Mix two species, balance every atom, and chain your discoveries to the goal.
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How to play
Combine two species to form new compounds, with one strict rule: a reaction only works if every atom is conserved. Build a tree of discoveries from your starting set and reach the target compound.
Fuse two species to attempt a new compound
Only mass-conserving, balanced reactions are accepted
Add each successful product to your bank of discoveries
Reach the target species, faster solves and more finds score higher
Game modes
Easy, Medium or Hard difficulty
Daily goal or Practice for fresh targets
Controls
Desktop: drag and click to pick the two species you want to fuse
Phone & tablet: tap or drag to select and combine species
Tips & strategy
Count atoms on both sides before committing, unbalanced pairs just fail
Build versatile intermediates that open several later reactions
Watch the timer and chase the chain that leads most directly to the target
What you'll learn
Combine is a chemistry crafting puzzle about reactions and compounds, with conservation of mass as the rule you cannot break.
Skills: chemical reactions, compounds, conservation of mass, chemical formulas
Best for: roughly grades 8–12 (ages 13+)
For parents & teachers: reaction chemistry through hands-on combining.
About Combine
Combine is a chemistry crafting puzzle about reactions, compounds and conservation of mass. It's an original, free browser game made in-house for PlayPendium.
A free, original browser game on PlayPendium. No download, no install.
