Recommendations

Death Game. Outwit other people and Survive The Game. Be the Last One Standing. Series of Movies. Survive.

Game concept with the protagonists trying to outplay the other. Lots of mind games and fun to be sought.

Similar concept with the game. The protagonist goes through trials to reach his final goal of saving his gf.

Has a concept with the Game part. Both protagonists try to win this game, and has to use their brains to do so.

the first season of this serie they must have the same basics + the same main male lead
you should take a look at this earlier version

version 2 from the same serie with same title it will likely be the same plot with same main male lead

Both take place in Imperial Japanese occupied Chinese cities, world war, spies, conspiracies. Both take place during 1930s.

Male leads of both the shows are rich and seem to be short on time. Both leads have destroyed the female leads' lives. Both the dramas are melodramatic.

Quartet surely reminds me of my another favorite : Age of Youth.
Not musically related, but this drama revolves around friendship between five college girls living under the same roof.

Each of them have their own personal problems, pasts and secrets that will be revealed one by one. Despite their different personalities, they develop a strong bond throughout the story. It is also a slice of life drama, the romance is there but it's not the main part of the story.

It's really fun, fresh, sometimes quirky and these girls are lovely as the quartet!
The Osts are surely something to look up to. Don't miss this one.

A patriotic woman disused as a male is part of a rebellious group out to remove Japanese corruption from her country out of Patriotism in both shows.
Both female leads are excellent at using a gun
Both female leads lost close family members are killed which is behind their motivation to be part of the rebel group.

Around the same time period. Features strong fighting women and focuses on patriotism. A lot of conflict between Japan and Korea.

Both has the same writer, director & even the studio is same.
Writer : Kim Eun Sook
Director : Lee Eung Bok
Studio : Studio Dragon

In both series after an accident the main girl believes she's a high school student.
Also her main interest tries to make her regain her memories.

Both star Ha Suk Jin where he is a little more aloof and seems to have very high standards. He's a little more willing to offer help in Your House Helper than he is in Drinking Solo, but he proves to have a softer side after the main character breaks him down a little.

Another period drama with a strong female lead and a similar male lead. Both plots are very addictive and the cast in both dramas are well known actors or idols.