As you probably know Tree of Savior draws heavily on Baltic mythology. I say Baltic on purpose cose it often says Lithuanian mythology when in fact most Baltic tribes (ethnic groups and nationalities today) mostly share the same belifes with little difference in between.

Although Balts were christianized pretty late (15th century) the knowledge about their belifes is pretty incomplete. Their mythology is similar to Norse and Slavic (World Tree, similar gods). They warshiped a wide variety of gods and godesses that were personification of nature, weather effects and celestial bodies. Tree of Savior developers took just few (and interestingly only female - early Baltic tribes were matrialchal, but I don’t think thats the reason ^^) dieties:

Laima, godess of fate. She is associated with childbirth, marriage, and death. In Latvian mythology she is one of the three fate goddesses (similar to Greek Moiraies). In Lithuanian mythology she aparentlly doesn’t have sisters but is related to Dalia (also goddess of fate) and Giltinė (goddess of death)

Giltinė, goddess of death. Also known as The Reaper, Maras (Plague), Kolera (Cholera) etc. Her sacral bird is the owl. She has sister called Laimė (goddess of good luck) which is not to be confused with Laima (devs missed this one).

Saulė, the sun goddess. She is goddess of life and fertility, warmth and health, patroness of the unfortunate, especially orphans. She had a daughter with Mėnuo (Moon). Her name is Žemyna (Earth).

Žemyna, goddess of the Earth. She personifies the fertile earth and nourishes all life on earth, human, plant, and animal. All that is born of earth will return to earth, thus her cult is also related to death.

Gabija, goddess of fire. She is the protector of home and family. Gabija could take forms of a cat, stork, rooster, or she could appear as a woman clothed in red. If you piss on fire you piss her off apparently ^^’

Vakarinė, goddess of the Evening Star. She makes the bed for Saulė in the evening.

Other stuff:

Krivis are priests in Romuva, a neopagan religion from Lithuania based on pre-christian belifes of Baltic people. Aukuras is an altar made from pile of stones on top of which is fire lit. People sing Dainas around the fire. Daina (Daino in the game) is a vocal folk music in the Baltic languages, and is preserved in Lithuania and Latvia. Lithuanian dainos (meaning “songs”) are often noted not only for their mythological content, but also for relating historical events.

Žaltys (probably Zalciai), the grass snake (common snake in Europe, Natrix natrix in latin), is a household spirit and a sacred animal of the sun goddess Saulė. It is a guardian of the home and a symbol of fertility.

Žaibas (Zaibas ingame) means lightning in Lithuanian. Lightning is associated with thunder god Perkūnas (similar name to Slavic thunder god Perun and both of those gods connected to Parjanya from Vedic religion).

Melstis means to pray in Lithuanian.

Dievdirbys means “God Carver” in Lithuanian. They were the wood carver that carved statues of Jesus or Christian saints out of one piece of wood with simple tools.**

The Owl Statue is probably connected to Giltinė,

Ausrine is Lithuanian goddess Aušrinė, the Morning Star, Vakarinė’s counterpart (both Morning Star and Evening Star are Venus in case you didn’t know x). Mėnuo (Moon), Saulė’s (Sun) husband had an affair with Aušrinė. He and Saulė divorced but both of them wanted to see their daughter Žemyna (Earth) so that’s why Sun shines in the day and Moon shines in the night.

Austras Koks (meaning Solar Tree) is a usually rectangular pattern that represents world tree often found in Latvia. It symbolises the growth of people that is connected to Sun’s energy and the order of life*. In Romuva religion it is called Twilight Tree (according to wiki article).

*credits to Nekumata from Tree of Savior reddit page

** credits to galguts81

Here are two most known folk stories from Lithuania:

Jūratė and Kastytis - supershort version: sea goddess Jūratė falls in love with young fisherman Kastytis and they live underwater in her castle made of amber. Thunder god Perkūnas gets jelaous and destroys her castle with his lightning and Baltic sea is washing ashore amber to this day (this is true, there’s a lot of amber there).

Eglė the Queen of Serpents - another supershort version: Eglė promises Serpent Prince that she will marry him, her brothers try to trick him but fail and she has to marry him. She lives happily until she visits her brothers with her children after which her brothers kill Serpent Prince.

Additional sites I used:

http://www.lithuanian.net/mitai/cosmos/baltai.htm

Baltic_mythology

Lithuanian_mythology

Latvian_mythology

List_of_Lithuanian_mythological_figures

Feel free to correct me, comment or add something!