End of Abyss is a horror game developed by Section 9 Interactive, a studio founded by former Little Nightmares developers, which combines the eerie atmosphere of Little Nightmares with Metroidvania gameplay and 1990s sci-fi horror elements. The game follows Cel, a technician descending into an abandoned underground facility, deliberately making the player feel small and lost through clever use of perspective, scale, and darkness. The atmospheric tone succeeds in creating genuine unease, though the execution has some rough edges.

The game employs multiple techniques to disorient players: towering crew members in bulky gear, a top-down camera that renders Cel minuscule, and vast metallic structures bathed in deep blue light. The story remains intentionally mysterious, with minimal exposition and scattered environmental storytelling that hints at an unknown plague and abandoned structure. Whilst the Metroidvania structure works well for a horror game that thrives on exploration and discovery, the game struggles with cohesive level design and visual consistency, making navigation occasionally frustrating—a common pitfall for a debut title attempting this genre's intricate interconnected design.