Games like Millionaire Manor
Games like Millionaire Manor include The Room, Morphopolis, Labyrinth City: Pierre the Maze Detective, The Room 4: Old Sins, and The Room Two. We matched them by the tags players give Millionaire Manor on Steam (Adventure, Hidden Object, Puzzle, and Casual): closest matches first, and among equally close ones the better-known games.

The Room
Shared: Puzzle · Adventure · Hidden Object

Morphopolis
Shared: Puzzle · Hidden Object · Adventure

Labyrinth City: Pierre the Maze Detective
Shared: Adventure · Hidden Object · Casual

The Room 4: Old Sins
Shared: Puzzle · Adventure · Hidden Object

The Room Two
Shared: Puzzle · Hidden Object · Adventure

TOEM: A Photo Adventure
Shared: Adventure · Puzzle · Casual

Boxes: Lost Fragments
Shared: Puzzle · Adventure · Casual

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

Hidden Folks
Shared: Hidden Object · Casual · Puzzle

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

Sinister City
Shared: Adventure · Hidden Object · Casual

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

The Room Three
Shared: Adventure · Puzzle · Hidden Object

Scribblenauts Unlimited
Shared: Adventure · Puzzle · Casual

Adam Wolfe
Shared: Adventure · Hidden Object · Casual

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

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

Pikuniku
Shared: Adventure · Puzzle · Casual

Grim Legends: The Forsaken Bride
Shared: Hidden Object · Adventure · Puzzle

Sherlock Holmes and The Hound of The Baskervilles
Shared: Adventure · Hidden Object · Casual

Varenje
Shared: Adventure · Puzzle · Hidden Object

There Is No Game: Wrong Dimension
Shared: Puzzle · Adventure · Casual

The House of Da Vinci
Shared: Hidden Object · Puzzle · Adventure

Syberia
Shared: Adventure · Puzzle · Casual