Games like Sinister City
Games like Sinister City include The Room, The Room Two, The Room Three, The Room 4: Old Sins, and Frankenstein: Master of Death. We matched them by the tags players give Sinister City on Steam (Hidden Object, Adventure, Casual, Indie, and Point & Click): closest matches first, and among equally close ones the better-known games.

The Room
Shared: Puzzle · Point & Click · Adventure

The Room Two
Shared: Hidden Object · Puzzle · Point & Click

The Room Three
Shared: Adventure · Puzzle · Indie

The Room 4: Old Sins
Shared: Adventure · Puzzle · Point & Click

Frankenstein: Master of Death
Shared: Hidden Object · Casual · Adventure

Morphopolis
Shared: Hidden Object · Indie · Puzzle

There Is No Game: Wrong Dimension
Shared: Indie · Adventure · Point & Click

The House of Da Vinci
Shared: Hidden Object · Puzzle · Point & Click

Boxes: Lost Fragments
Shared: Adventure · Puzzle · Casual

Rusty Lake Paradise
Shared: Adventure · Indie · Point & Click

Alchemy Mysteries: Prague Legends
Shared: Hidden Object · Adventure · Casual

Hidden Folks
Shared: Hidden Object · Casual · Indie

Enigmatis 2: The Mists of Ravenwood
Shared: Hidden Object · Adventure · Casual

Chants of Sennaar
Shared: Adventure · Puzzle · Indie

Enigmatis: The Ghosts of Maple Creek
Shared: Hidden Object · Adventure · Casual

Gorogoa
Shared: Indie · Puzzle · Casual

Sally Face - Episode One
Shared: Indie · Adventure · Puzzle

Underground Blossom
Shared: Adventure · Indie · Point & Click

Dracula's Legacy
Shared: Hidden Object · Casual · Indie

Abyss: The Wraiths of Eden
Shared: Hidden Object · Adventure · Casual

Samsara Room
Shared: Adventure · Indie · Puzzle

Rusty Lake: Roots
Shared: Indie · Adventure · Point & Click

9 Clues: The Secret of Serpent Creek
Shared: Hidden Object · Adventure · Casual

9 Clues 2: The Ward
Shared: Hidden Object · Adventure · Casual