Games like Not Tonight 2
Games like Not Tonight 2 include Stardew Valley, Not Tonight, Papers, Please, Graveyard Keeper, and Fields of Mistria. We matched them by the tags players give Not Tonight 2 on Steam (Simulation, RPG, Pixel Graphics, Life Sim, and Alternate History): closest matches first, and among equally close ones the better-known games.

Stardew Valley
Shared: Pixel Graphics · RPG · Life Sim

Not Tonight
Shared: Simulation · Pixel Graphics · RPG

Papers, Please
Shared: Simulation · Pixel Graphics · Indie

Graveyard Keeper
Shared: Pixel Graphics · RPG · Simulation

Fields of Mistria
Shared: Pixel Graphics · RPG · Simulation

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

To the Moon
Shared: Pixel Graphics · Indie · RPG

Little Witch in the Woods
Shared: Pixel Graphics · Simulation · Life Sim

Littlewood
Shared: Pixel Graphics · Simulation · Life Sim

The Escapists
Shared: Pixel Graphics · Simulation · 2D

OMORI
Shared: Pixel Graphics · RPG · Indie

Sun Haven
Shared: Pixel Graphics · Life Sim · RPG

Undertale
Shared: Pixel Graphics · RPG · Indie

Beholder Conductor
Shared: Dystopian · Simulation · Political Sim

Volcano Princess
Shared: Life Sim · RPG · Simulation

Retirement Simulator
Shared: Simulation · RPG · Life Sim

DRAPLINE
Shared: Simulation · RPG · Pixel Graphics

Beholder
Shared: Dystopian · Simulation · Political Sim

My Time at Portia
Shared: RPG · Life Sim · Simulation

There Is No Game: Wrong Dimension
Shared: Pixel Graphics · Indie · Puzzle

Finding Paradise
Shared: Pixel Graphics · RPG · 2D

WorldBox - God Simulator
Shared: Simulation · Pixel Graphics · Life Sim

OneShot
Shared: Pixel Graphics · Indie · Puzzle

Yes, Your Grace
Shared: Pixel Graphics · RPG · Indie