Mortimer Goth lives in the Goth mansion with his daughter Cassandra and son Alexander. His longtime wife Bella, is missing, having been abducted by aliens.
Mortimer Goth was born outside of SimCity in the Old Country, which could refer to a place such as England or unknown rural area. His father, Gunther, moved the family to SimCity when Mortimer was young. By the time we get to the original Sims, Mortimer lives with his wife Bella and his daughter Cassandra in a house that seems to change in Sims 2 many believe that the old house burned down supported in Mortimer's memories that say there was a fire and then they moved into a new house. He is also in the science career track (which he will later excel in). His parents live in a large estate on Maple street nearby. Strangely enough in the original Sims his star sign is actually Taurus, which later changes to a Cancer in the Sims 2.
Life leading up to The Sims 2
Between the two sims games, a lot happens in Mortimer's life. He rises through the ranks of the science career to become an esteemed mad scientist, accumulating a lot of wealth along the way. (which later attracts the attention of the Caliente sisters.) Mortimer's parents; Gunther and Cornelia both die, and eventually Mortimer and Bella have a son, Alexander. As of The Sims 2 he is retired and his daughter, Cassandra (who is an adult by this time), is following in her father's footsteps in the science career. Cassandra is engaged to the town Casanova Don Lothario, with plans to settle down.
Perhaps the most significant event is the mysterious disappearance of Mortimer's wife Bella. All evidence points to alien abduction, but it's interesting to note she was last seen "scaling the deck" of Don Lothario's condo. Could it have been that she was looking through Don Lothario's telescope that brought aliens? Bella's disappearance was well publicized, with "missing" notices appearing on milk cartons and in papers. This publicity has lead to many theories and rumors, and even supposed sightings in Strangetown. As of The Sims 2, she remains missing. Since Bella is gone, and she and Mortimer are presumably not married anymore. Mortimer is now romantically involved with Dina Caliente, unaware she is only dating him to get access to his millions.
It has also been said on the Sims 2 page, Mortimer was a chemical engineer. It was in Q&A and EA games made it seem as if Bella answered them. It was told, he made a potion to keep her at that age.
Life leading up to The Sims 3
There are some screenshots that prove Mortimer appears in The Sims 3 as a child who lives with his parents and with Bella Goth, both Mortimer and Bella as children.
Mortimer and Bella are best friends and he is one day older than her. His traits are Grumpy and Artistic.
In The Sims, Mortimer lives with his wife Bella and his daughter Cassandra in a small house on Sim Lane (despite his parents' massive mansion on Maple Street). It only has 5 rooms on two floors: a lounge, a kitchen and two bedrooms
as well as a small bathroom. The garden, although much larger, is plain except for the large graveyard, which characterizes the Goths' often seemingly morbid appearance. At night ghosts often haunt the lot.
By The Sims 2, Mortimer's wealth led to a much larger estate, with 3 floors as well as a roof terrace. There is a kitchen, a study, an entrance hall and a dining room, three bedrooms, three bathrooms and a landing as well as a bare attic room. The garden is very interesting. The front path is flanked by two large trees. The whole house is on a raised deck, with a flight of steps to reach the front door. If a user closely examines the floor plans, one can tell that the Sims 1 house has the same floor plan (except with more floors and a foundation), suggesting that this is perhaps the same house with many additions added on. Behind the house is a wedding arch, along with chairs and tables(suggesting an imminent wedding) perhaps intended for Don and Cassandra. Also featured is a graveyard with six dead relatives.
In Sims3 Mortimer and Bella are children living with their parents in Sunset Valley.
Mortimer Goth in Other Games
Mortimer Goth is perhaps one of the most well known Sims in the world. Many stories have been made about him and his family and he appears in other games such as The Sims: Bustin' Out, the TV family on the Sims 2 for GameBoy Advance and SimGolf. Also in SimCity 4 there is a Sim with a likeness of Mortimer however the name is different.
Inspiration
Mortimer Goth's appearance is likely to be based on that of Vincent Price, a famous American horror actor.
Gallery
Mortimer from The Sims 2
Mortimer and Parents
Bella Goth plays on the swing set with Mortimer while her mother is waving at them.
Taurus
Cancer
