Big Brother 1

Big Brother 1 was the first season of Big Brother SIMulator. It began on August 21, 2019 and ended on August 25, 2019. In-game it lasted 13 days, ending when Kyla Jones won over DeShaun King in a 4-3 vote.

Twists

 * The Family Factor: Each houseguest entered the competition with a close loved one. The relationships were mother-son, sisters, ex-spouses, best friends, flames, and husband and wife. For the first three weeks, these houseguests would be nominated together in double evictions, with two pairs nominated each week and houseguests voting to evict one from each pair. When a houseguest lost their partner, they gained a new partner as the other surviving nominee for the remainder of the first three weeks.
 * Celebrity Twist: In Weeks 2 & 3, two pairs of celebrities entered the house to compete as pairs. In Week 2, Octavia Moon and Thorne Bailey entered. In Week 3, Judith Ward and DeShaun King entered.
 * Triplet Twist: In Week 4, it was revealed that Delilah Jones, the triplet of houseguests Lila Jones and Kyla Jones, would enter as a houseguest.
 * Mini-Houses: In Week 4, the house was randomly split into two separate houses to conduct a week of competitions and eviction. Between the two evicted houseguests, one would earn re-entry via public vote. Judith and Kyla were evicted, and Kyla won re-entry.
 * Double Eviction: In Week 6, it was revealed the week would be a double eviction, with one HOH nominating three others and eligible houseguests voting to save one of the three.

Swapped Pairs
Houseguests who lost their partner during the double eviction would become partners for the remainder of the pre-jury game.

In Week 1, Bee Dagombas and Luke Xian were evicted, making Cameron Bakerfield and Abeena Dagombas become partners. In Week 2, Abeena Dagombas and Lila Jones were evicted, making Cameron Bakerfield and Kyla Jones partners.

Alliance Structure

 * The Triplets + Judith and DeShaun
 * Lila and Kyla
 * Lila gets evicted; Judith, DeShaun and Delilah join the cast
 * F3 Alliance: DeShaun, Kyla, Delilah
 * Chiara and Taylor + Octavia and Thorne

Noteworthy Pairs
(Pre-existing relationships excluded)
 * Kyla and Bee
 * Cameron and Chiara
 * Abeena and Cameron

Noteworthy Rivalries

 * Thorne and DeShaun
 * Kyla and Chiara

Week 1
In Week 1, four pairs of houseguests with pre-existing entered the house: divorcees Taylor and Chiara; sisters Kyla and Lila; best friends Luke and Cameron; and mother and son Abeena and Bee. With the pair twist, one houseguest would win the Head of Household and go on to nominate two other complete pairs, with their own partner gaining immunity. Then, the four nominees, HOH, and partner of the HOH competed in a POV ceremony. The winner of the POV would then have the option to save one of the pairs. If they did, the last remaining pair would be nominated. Then, in the eviction, all houseguests that were neither the HOH nor the nominees cast their vote to evict one houseguest from each nominated pair. The houseguest from each pair with the greatest number of votes to evict was evicted, and the two houseguests who survived the eviction joined together and formed a new pair.

Chiara won the franchise's first HOH and decided to keep Cameron and Luke off the block, as she had formed a friendship with Cameron. However, when Kyla won POV and took down her pair, Cameron and Luke were the only remaining nominees to go on the block. Because she made a friendship with Cameron, Chiara advocated to get Luke evicted. Taylor and Lila got along better with Abeena than they did with Bee, whereas Kyla preferred Bee. This led to Luke being evicted in a 3-0 vote and Bee evicted in a 2-1 vote.

Week 2
A new pair entered in Week 2: Octavia and Thorne, celebrity spouses. Octavia then pulled out an HOH and she and Thorne got close with Taylor and Chiara, leading her to keep the duo safe. When Thorne won POV, he kept his wife's nominations the same. Abeena and Lila were both less socially enmeshed in the house than Cameron and Kyla respectively, leading to both being evicted in separate 3-0 votes.

Week 3
A pair of celebrity flames, Judith and DeShaun, entered the game in Week 3. DeShaun bonded with Kyla. Then, Judith won HOH. Bearing DeShaun's relationship with Kyla in mind, she nominated Chiara and Taylor as well as Thorne and Octavia. Taylor went on to win POV, taking himself and Chiara down and forcing Cameron and Kyla to be replacement nominees. The house universally preferred Kyla to Cameron socially, leading Cameron to being evicted in a 3-0 vote. While DeShaun liked Octavia and voted in her favor, Chiara and Taylor saw her as a bigger threat than Thorne and less easy to control strategically and chose to evict her in a 2-0 vote. They became the first and second jurors, respectively.

Week 4
In Week 4, the final late entry came in where Delilah, a secret triplet of Kyla and Lila, entered the game, as one of her sisters was still in the game. Then the game was randomly split into Mini Houses, where one house had four houseguests and the other had three. DeShaun, Thorne, Taylor and Judith were in one house and Chiara, Kyla and Delilah were in the other. In the house of four, an HOH and POV competition were held, whereas in the house of three only an HOH competition was held where the houseguest who won cast the sole deciding vote to evict. Chiara was upset because unless she won the HOH she would be evicted.

Beginning with the house of four, DeShaun won HOH and nominated Thorne and Taylor, both of whom he saw as threats and neither of whom he had a pre-existing relationship with, like he did with Judith. However, Thorne won POV and took himself off the block, giving him the sole vote to evict between Taylor and replacement nominee Judith. Ultimately, due to his relationship with Taylor and the duo that was DeShaun and Judith, he cast his vote to evict Judith, making her the third juror in a 1-0 vote.

Chiara got incredibly lucky and pulled out her own HOH in the house of three, leaving her to decide between which of the sisters she would keep in the game. Since Kyla had deeper alliances and Delilah was not a threat, Chiara evicted Kyla in a 1-0 vote, making her the fourth juror.

Week 5
At the start of Week 5 the Mini Houses disbanded. Additionally, one of the two houseguests evicted in the Mini Houses, either Judith or Kyla, was to win re-entry by a public vote. Kyla won re-entry into the game.

Taylor won HOH and nominated Delilah and DeShaun, both of whom were on the opposing side of the house socially. He chose to keep Kyla safe initially, as he had a better connection with her. However, Kyla won POV and took her sister off of the block, leading Taylor to nominate his own ally Thorne because his only other option was his ex-wife, Chiara. While Chiara voted to evict threat and opponent DeShaun, sisters Kyla and Delilah chose to keep their ally safe and evicted Thorne in a 2-1 vote, making him the fourth juror.

Week 6
In Week 6, a double eviction was announced, where the HOH would nominate three houseguests for eviction and then, after the POV, the houseguest who was not nominated would vote to save one of the three nominees. DeShaun won HOH and nominated Chiara, Taylor, and Delilah for eviction, keeping his closest ally, Kyla, off of the block, with the two of them planning on saving their mutual ally and friend Delilah if possible. Kyla then won POV, and her options were to use it and have herself go on the block or keep nominations the same and cast the deciding vote to save. She kept nominations the same, and voted to save her sister Delilah, sending home both of her biggest threats, Chiara and Taylor. They therefore became the fifth and sixth jurors in a 1-0-0 vote.

Week 7
With Week 7, the three allies of Delilah, Kyla and DeShaun reached the final three. However, DeShaun was worried that he was the odd one out, since the sisters planned on taking one another to the finale. Ultimately, his worries were assuaged when he won the final HOH, and took out Delilah, who he was less close to, seeing neither sister as a major threat. Delilah became the seventh and final juror in a 1-0 vote.

Week 8
The jury had to decide between which member of the final two, DeShaun or Kyla, they wanted to see win the game. For Delilah, it was an easy decision, and she voted for her sister to win the game. Taylor and Chiara had differing opinions and argued somewhat, with Taylor getting along with DeShaun better and respecting his game more, and also being less upset with him over his and Chiara's eviction. However, Chiara respected her rival's quiet gameplay and got along with her better, leading her to grant Kyla her vote to win whereas Taylor voted for DeShaun to win. Judith was DeShaun's pair, making voting for him an easy decision. Due to Octavia and DeShaun's friendship, Octavia also granted DeShaun her vote to win. This left Cameron's vote, and due to his friendship with Kyla Cameron decided to vote for Kyla to win, leading Kyla to win in a 4-3 vote and becoming the first winner in franchise history.

Trivia

 * Big Brother 1 was the shortest season in franchise history, lasting 13 days.

Post-Season
There are 10 houseguests that debuted this season and returned for a later season of Big Brother, giving the cast a 77% returnee rate.


 * Cameron, DeShaun, Lila, and Octavia returned for Big Brother 2.
 * Abeena, Kyla, and Chiara returned for Big Brother 4.
 * DeShaun, Kyla, Lila, Chiara, Taylor, and Octavia returned for Big Brother 6.
 * Delilah and Luke returned for Big Brother 7.
 * Luke was crowned the winner of the season.
 * Delilah, Kyla, and Lila returned for Big Brother 11.
 * Delilah was crowned the winner of the season.
 * Chiara returned for Big Brother 18.
 * Chiara was the runner-up of the season.
 * Delilah, Kyla, and Luke returned for Big Brother 22.

Additionally, Kyla returned for the spin-off season Cast Competition 1. She won the season alongside Big Brother 2 houseguest Yaro Toure.