Games like 15in1 Solitaire
Games like 15in1 Solitaire include Balatro, Plants vs. Zombies GOTY Edition, Bloons TD 6, Stacklands, and Kingdom Rush - Tower Defense. We matched them by the tags players give 15in1 Solitaire on Steam (Casual, Strategy, Card Game, Solitaire, and 2D): closest matches first, and among equally close ones the better-known games.

Balatro
Shared: Card Game · Strategy · Singleplayer

Plants vs. Zombies GOTY Edition
Shared: Strategy · Casual · Singleplayer

Bloons TD 6
Shared: Strategy · Casual · Singleplayer

Stacklands
Shared: Card Game · Strategy · Solitaire

Kingdom Rush - Tower Defense
Shared: Strategy · Casual · 2D

UNO
Shared: Card Game · Casual · Strategy

Game Dev Tycoon
Shared: Strategy · Casual · Singleplayer

Rana Card
Shared: Casual · Card Game · Strategy

Ballionaire
Shared: Casual · 2D · Singleplayer

Slay the Spire
Shared: Card Game · Strategy · Singleplayer

Plague Inc: Evolved
Shared: Strategy · Casual · Singleplayer

Kingdom Rush Origins - Tower Defense
Shared: Strategy · Casual · 2D

Ratropolis
Shared: 2D · Strategy · Card Game

Kingdom Rush Frontiers - Tower Defense
Shared: Strategy · 2D · Singleplayer

The Zachtronics Solitaire Collection
Shared: Casual · Solitaire · Card Game

Slay the Spire 2
Shared: Card Game · Strategy · 2D

RACCOIN: Coin Pusher Roguelike
Shared: Strategy · Casual · Singleplayer

Wingspan
Shared: Card Game · Strategy · Casual

Library Of Ruina
Shared: Card Game · Strategy · Singleplayer

Peggle Deluxe
Shared: Casual · Singleplayer · 2D

BidKing
Shared: Casual · Strategy · 2D

Golf Peaks
Shared: Strategy · Casual · Card Game

911 Operator
Shared: Strategy · Casual · Singleplayer

Zup! S
Shared: Casual · 2D · Singleplayer