In Baldur's Gate 3, players can come across a ruined house, "The House with Flowers," that still has an occupant. This occupant is Oliver, a tiefling child who is unusually lively for someone infected with the shadow curse.
In fact, Oliver seems unaware that there's anything wrong at all, and he wants to play "Hide and Seek" with the party when they arrive. If the party agrees, they can get a useful magic item from Oliver. If they don't, they'll have to fight a potentially difficult battle with his "family." Finding Oliver without a fight isn't hard, but only if Baldur's Gate 3 players know exactly what to do as they progress toward the second act.
How to Beat Oliver at Hide and Seek
First, while players can learn a bit more about Oliver's situation by passing Arcana and Insight checks, no dialog option will let the party skip Hide and Seek. And if players don't play along, Oliver will get angry and have his family attack the party.
For the first game, Oliver will turn invisible and hide behind the cart in front of the house. Players can see which direction he goes by watching the word "Invisible" run out of the house. A party member must then go to the cart and pass a Perception check to spot Oliver, but this check is fairly easy.
At this point, Oliver will get upset that the party beat him so quickly and demand a second game. If players refuse at this point, the family will show up and attack. If players agree, Oliver will up the stakes: not only does the party have to find Oliver, they also have to avoid his family.
To avoid getting spotted, players should keep three of their party members inside the house and approach Oliver's first hiding spot with just one character. The far corner from where Oliver first appears (the northwest corner) is a good place for them to wait.
Turn-based mode will start automatically when Oliver starts the second game of Hide and Seek, so have the three party members in the house sneak while the fourth member dashes inside to the spot where Oliver first appeared. If the party is together, they should still be able to sneak to the corner of the house during the first round.
After one round of waiting, Oliver will start running back into the house, and after two rounds Oliver will be standing in his old spot. Players must wait for him to get there because party members can't speak with him until he stops running.
At this point, players should choose the character next to Oliver, tell them to stop sneaking, and then speak to Oliver. Oliver will be angry at having lost twice, but he'll give the party a prize anyway. This prize is the Ring of Shadows, which lets the wearer cast Pass Without Trace once per day. If players get caught and have to fight the shadow family, Oliver will still give the party his "second-place prize," which is also the Ring of Shadows.
How to Fight Oliver's Family
If players refuse to play Hide and Seek, or if they get caught during the second game, Oliver's family will attack the party. They consist of "Mummy," "Daddy," and "Doggy." The two parents are greater shadow creatures with an aura that invokes the strengthened Shadow Curse in a radius around them. This deals Necrotic damage to anyone who gets too close, unless players have some protection from the effect. Aside from the curse, the parents like to teleport onto the roof and attack party members.
The Doggy is closer to a lesser shadow in its stats. It has fewer hit points, but it likes to run in, attack someone, then turn invisible and run off. A powerful light source can help keep it from disappearing each time.
One last thing players can do is pickpocket the 
Ring of Shadows
from Oliver during the second game. Do so and then win the game to get a non-magical 
Silver Band
as the quest reward instead.
Baldur's Gate 3 is available now on macOS and PC.
