Well-reviewed games you can 100% in less than 10hrs:

• Portal
• The Henry Stickmin Collection
• OneShot
• Stray
• Grimm’s Hollow
• Any of The Room games
• Pineapple on Pizza
• There Is No Game: Wrong Dimension
• Doki Doki Literature Club
• TOEM
• Finding Paradise
• The Murder of Sonic the Hedgehog
• CULTIC
• Gorogoa
• The Case of the Golden Idol

Well-reviewed games you can probably beat in around 10hrs, but not quite 100%:

• Portal 2
• Vampire Survivors
• Pizza Tower
• Katana ZERO
• A Hat in Time
• Resident Evil 2
• Hotline Miami
• The Wolf Among Us
• Undertale
• Papers, Please
• Baba Is You
• DUSK
• POSTAL 2
• Outlast

Edit: formatting is pain

Edit 2: I missed the part about low-end hardware, but it sounds like the only ones of these you may not be able to run are Stray and Resident Evil 2