Games like The First Million
Games like The First Million include Luck be a Landlord, Balatro, Slay the Spire, (the) Gnorp Apologue, and Bills Must Be Paid. We matched them by the tags players give The First Million on Steam (Roguelike Deckbuilder, Incremental, Capitalism, Management, and Strategy): closest matches first, and among equally close ones the better-known games.

Luck be a Landlord
Shared: Roguelike Deckbuilder · Deckbuilding · Strategy

Balatro
Shared: Roguelike Deckbuilder · Deckbuilding · Strategy

Slay the Spire
Shared: Roguelike Deckbuilder · Deckbuilding · Strategy

(the) Gnorp Apologue
Shared: Incremental · Strategy · Idler

Bills Must Be Paid
Shared: Incremental · Capitalism · Strategy

Scritchy Scratchy
Shared: Incremental · Idler · Resource Management

Cookie Clicker
Shared: Incremental · Idler · Management

Slay the Spire 2
Shared: Roguelike Deckbuilder · Deckbuilding · Strategy

Shelldiver
Shared: Incremental · Management · Resource Management

Backpack Hero
Shared: Roguelike Deckbuilder · Deckbuilding · Inventory Management

Keep on Mining!
Shared: Incremental · Idler · Capitalism

Aotenjo: Infinite Hands
Shared: Roguelike Deckbuilder · Strategy · Deckbuilding

Tower Wizard
Shared: Incremental · Strategy · Idler

Terracards
Shared: Roguelike Deckbuilder · Strategy · Deckbuilding

Gamblers Table
Shared: Incremental · Management · Capitalism

Turmoil
Shared: Management · Strategy · Resource Management

Nodebuster
Shared: Incremental · Strategy · Idler

Big Ambitions
Shared: Management · Capitalism · Economy

Chef Knight
Shared: Incremental · Strategy · Management

Dungeons & Degenerate Gamblers
Shared: Roguelike Deckbuilder · Strategy · Deckbuilding

9 Kings
Shared: Strategy · Roguelike Deckbuilder · Deckbuilding

Dicey Dungeons
Shared: Roguelike Deckbuilder · Deckbuilding · Strategy

Cities: Skylines
Shared: Management · Strategy · Resource Management

IdleOn - The Incremental MMO
Shared: Incremental · Idler · Management