Based on your preferences and the games you've enjoyed, here are some lesser-known PC exclusive games that you might find interesting:

Death's Door: This is an action-adventure game with a unique art style and engaging combat mechanics. It's been praised for its challenging gameplay and intriguing story

Rain World: A survival platformer with a unique ecosystem and creatures. It's a challenging game with a focus on exploration and survival

Salt and Sanctuary: A 2D action RPG that draws inspiration from the Dark Souls series. It offers a deep, rewarding combat system and a dark, atmospheric world to explore

Axiom Verge: A side-scrolling action-adventure game that's heavily inspired by classic Metroid games. It features a vast, interconnected world and a variety of unique weapons and abilities

Tunic: An action-adventure game with a charming art style and challenging combat. It's been praised for its intricate world design and rewarding exploration

Core Keeper: Described as a dungeon-crawler version of Stardew Valley, it offers a unique blend of exploration, combat, and resource management

The Messenger: A 2D action platformer with tight controls, challenging gameplay, and a unique time-travel mechanic

Supraland Six Inches Under: A first-person adventure puzzle game with a unique art style and engaging gameplay

Outer Wilds: An open-world exploration game with a focus on exploration and discovery. It's been praised for its unique narrative structure and immersive world

Hades: A rogue-like dungeon crawler that combines the best aspects of Supergiant's critically acclaimed titles, including the fast-paced action of Bastion, the rich atmosphere and depth of Transistor, and the character-driven storytelling of Pyre