Ash Trapped In Cracked Lips is a semi-conventional TTRPG about surviving in a dry, charred plane of limbo. You could use it to play Dark Souls, but it has a distinct flavor all its own.
The PDF is 58 pages, with extremely strong Borg-y type art and layout. Everything is clear and easy to read despite the wildly splashed colors, and the mix of photo edits and contrasting colors produces a surprisingly cohesive whole.
Mechanically, Ash is a d20 game with a few osry adjustments. PCs roll dice. NPCs almost never do. Rolls use target numbers, and you have an easier time making them if you have an appropriate skill. Resting recovers a scant amount of hit points, and combat and hazards chip away at your HP until you are defeated.
There are also some distinctly survival horror-y additions. Resting is only possible in shelter. Characters routinely gain Thirst, which applies damage if it climbs high enough. Characters also gain Heat whenever they are exposed to horrors, and transform if it climbs high enough. Ammunition, item durability, and spare parts are also tracked.
Character creation is Class based, with each Class being simple, direct, and evocative. Classes come with a single choice each, but the choice feels meaningful, and Classes have plenty of room to act outside of their default kit.
GMing Ash is loose but interesting. The setting is unmapped, but the party navigates from Smoke to Smoke across the trackless wastes. Each Smoke is an area of interest, and the spots between them can be options to rest, recover, or reduce Thirst. The system puts an emphasis on the negative spaces between Smokes, and there are detailed roll tables for things the party can run into out in the wastes.
Ash comes with a small bestiary, but the focus of the game is more on atmosphere and pacing than combat.
Overall, if you like the idea of lonely, haunted areas and barren liminal regions, and if you're comfortable with an osr style of GMing, you should check this out. The setting thrives on atmospheric narration and a slow rollout of detail, so above all else do not hurry this game into combat. Play with a focus on the setting's weight and pacing, and to see what the characters are like when the world around them falls quiet.