Transistor is an action RPG developed by Supergiant Games. In the game, you play as Red, a singer who came to own a powerful sword called the Transistor. In the game you have access to multiple different abilities including the ability to pause time and plan your next couple actions. The mechanics can sometimes get complex like when the attacks/abilities you get can be used as an active, passive, or upgrade component.
The UI is themed to have a mix between art deco and sci-fi. Many times it leans more towards the sci-fi aspect of it but it's art deco influence shows in places like the wings in your action bar and in the flourishes the Turn() bar. A lot of the UI is laid out in the center of the screen with a few outliers in the battle summery pop up and the some of the info screens. You can see in some of the info screens that it gets a little left-heavy like when inspecting Tap() or Resilience.
The typography in the game is clean and simple. They use a single Sans Serif font throughout but use bolding, colors, caps, and size for multiple different effects. It's a little disorienting to have multiple styles of titles for titles but in each of the individual screens it creates a unique visual hierarchy that works well for conveying important information. There is also a small inconsistency in the Profiles screen. The font size of the title is a different size then the other screens. This may have been to let the word "profile" to fill up more space to be slightly more consistent with the horizontal space between screens.
Transistor uses a combination of a blue-green color and gold. The only screens that break this theme is the Limiters screen. This seems deliberate to make sure the player understands that these boosts also come with consequences. It gives the screen a sense of danger and darkness. There is a tertiary color that is used sparingly when enemies are involved. This color is red. Red is used to indicate danger for the player. This can also be seen in the Limiters screen.
The biggest issue I have with the Transistor UI is when using abilities as upgrades, it's sometimes hard to decipher what the overall effect is and if there is a better spot to place the upgrade. I found myself switching back and forth between abilities and inspection to see what abilities I have active and what the inactive abilities names are. This could be fixed with a more complex screen but a more complex screen could be intimidating to newer players. Overall, the UX is very good, clean, and understandable.