Unlimited air supply
Combine Vanadium and Titanium Ore to get Titanium Alloy.
Then combine the Titanium Alloy and the Rebreather 10 to get an
Infinite Rebreather.
Item combinations
Acetic Anhydride + Acetyl Acid = Aspirin
Beryl Knife + Basalt = Magnetite/Jade /Augite
Beryl knife + Calcite = Limestone/Marble
Beryl knife + Gabro = Magnetite/Titanium Ore/Apatite
Beryl Knife + Granite = Orthoclase/Quartz
Beryl knife + Opiment = Yellow Paint
Deep Sea Water + Mega-ade 1000 = Mega-ade 2000
Deep Sea Water + Mega-ade 2000 = Mega-ade 4000
Deep Sea Water + Mega-ade 4000 = Mega-ade 8000
Deep Sea Water + Mega-ade 500 = Mega-ade 1000
Deep Sea Water + Tourmaline = Mineral Water
Diamond Knife + Calcedony = Carnelian/Sardonyx/Chrysoprase
Diamond Knife + Corundum = Ruby/Sapphire
Diamond Knife + Quartz = Citrine/Crystal /?
Limestone + Gabro = Cement
Mineral Water + Mega-ade 2000 = Supertonic Turbo
Mineral Water + Mega-ade 4000 = Supertonic Extra
Negative Ion Water + Mega-ade 1000 = Supertonic Dash
Negative Ion Water + Mega-ade 4000 = Royal Ampoule
Negative Ion Water + Mega-ade 500 = Supertonic
Ring + Tourmaline = Ion Ring
Snake Bite + Killer Spider = Scorpions Tail
Titanium Alloy + Rebreather 10 = Infinite Rebreather
Vanadium + Titanium Ore = Titanium Alloy
Water + Mega-ade 300 = Mega-ade 500
Water + Mega-ade 500 = Mega-ade 1000
Water + Oxidized Alcohol = Disinfection Liquid
Water + Tourmaline = Negative Ion Water
Free fish for the aquarium
After the aquarium is built, you can fill it with fish
that you have not yet photographed. For this to work, you should
already have about thirty photos of fish. When you go into the
menu to view stats on a fish, select all the different ways to
alphabetize the list. After you have done this several times,
choose which fish you want to populate your aquarium with. When
you select a fish, a different fish that you may not have even
seen yet should appear on the list, instead of the one you picked.
Put that fish in the aquarium and view it. Try every different
way to alphabetize the list until you get the correct one. There
are some fish that this trick does not seem to work on, however
it does work for a great number of them.