Games like Fraudster
Games like Fraudster include Undertale, Volcano Princess, Vampire Survivors, Emily is Away Too, and Mirror 2: Project X. We matched them by the tags players give Fraudster on Steam (Casual, RPG, 2D, Singleplayer, and Visual Novel): closest matches first, and among equally close ones the better-known games.

Undertale
Shared: RPG · Multiple Endings · Choices Matter

Volcano Princess
Shared: RPG · Multiple Endings · Choices Matter

Vampire Survivors
Shared: 2D · Singleplayer · Casual

Emily is Away Too
Shared: Casual · Choices Matter · Singleplayer

Mirror 2: Project X
Shared: Visual Novel · Singleplayer · RPG

Melvor Idle
Shared: RPG · Casual · Singleplayer

OneShot
Shared: Pixel Graphics · Singleplayer · Indie

DAVE THE DIVER
Shared: Casual · Pixel Graphics · Singleplayer

Legend of Mortal
Shared: RPG · Multiple Endings · Choices Matter

Yes, Your Grace
Shared: RPG · Choices Matter · Casual

Emily is Away <3
Shared: Casual · Choices Matter · Multiple Endings

Far Away
Shared: Singleplayer · Visual Novel · Choices Matter

OMORI
Shared: RPG · Multiple Endings · Pixel Graphics

Stardew Valley
Shared: RPG · Pixel Graphics · Casual

Back to the Dawn
Shared: RPG · Pixel Graphics · Multiple Endings

Milk outside a bag of milk outside a bag of milk
Shared: Visual Novel · Multiple Endings · Pixel Graphics

LoveChoice
Shared: Visual Novel · Choices Matter · Multiple Endings

NEEDY STREAMER OVERLOAD
Shared: Visual Novel · 2D · Multiple Endings

川建国同志想要连任/Comrade Trump's Re-election
Shared: Casual · RPG · 2D

Papers, Please
Shared: Singleplayer · Multiple Endings · Pixel Graphics

The Test
Shared: Multiple Endings · Singleplayer · Pixel Graphics

Matchmaking Inc.
Shared: Casual · RPG · Multiple Endings

DELTARUNE
Shared: RPG · Singleplayer · 2D

Touhou Mystia's Izakaya
Shared: Casual · RPG · Pixel Graphics