Here is the full list of all 52 Alchemy Classic achievements.
Create All Elements
complete: 100% Machines
invent: Musical instruments
create: Observatory, Astrolabe, Star chart
invent: Internal combustion engine
create: Origami
discover: Polluted Earth
create: Agricultural land
construct: Automated factory
construct: UFO
create elements: 400
invent: Scuba
construct: Active robot
construct: Forge
create elements: 300
discover: Sound
construct: Cloud castle
construct: Exhibit
create: Domestic animals
create elements: 200
construct: Potter's wheel
invent: Wheel
invent: Sail
produce: Textile
construct: Incomplete mechanism
create: Mammals
create: Flowers
create: Reptiles
create elements: 100
construct: Incomplete building
create: Amphibians
discover: Minerals
create: Shrub
create elements: 50
invent: Compass
create: Bacteria
invent: Sandglass
create elements: 25
create elements: 10
create: Fog, Rain, Snow, Thunderstorm, Wind
create: Flowers, Shrub, Trees, Forest
construct: Steam turbine, Steam engine, Steam boat
construct: Ornithopter, Sailplane, Airplane
produce: Caoutchouc, Rubber
construct: Nuclear power station, Atom battery, Atomic submarine
create: Wind Turbine, Water Turbine, Solar power plant
create: Alien, Robot, UFO, Freezer
create: Octopus, Dolphins, Whales
create: Dinosaurs, Flying Dinosaurs, Plesiosaurs
create: Dark chocolate, Milk chocolate
complete: 100% Chemical substances
create Borehole