Games like Just Spades
Games like Just Spades include UNO, Bloons TD 6, Liars Bar, Bloons TD 5, and Rento Fortune: Online Dice Board Game (大富翁). We matched them by the tags players give Just Spades on Steam (Casual, Strategy, Card Game, Tabletop, and 2D): closest matches first, and among equally close ones the better-known games.

UNO
Shared: Card Game · Casual · Tabletop

Bloons TD 6
Shared: Strategy · Casual · Family Friendly

Liars Bar
Shared: Casual · PvP · Multiplayer

Bloons TD 5
Shared: Strategy · Casual · Family Friendly

Rento Fortune: Online Dice Board Game (大富翁)
Shared: Casual · Strategy · Tabletop

ShellShock Live
Shared: Strategy · 2D · Casual

Golf With Your Friends
Shared: Casual · Multiplayer · Family Friendly

Slay the Spire 2
Shared: Card Game · Strategy · Co-op

Plague Inc: Evolved
Shared: Strategy · Casual · Indie

The Escapists 2
Shared: Strategy · 2D · Multiplayer

Balatro
Shared: Card Game · Strategy · Casual

100% Orange Juice
Shared: Strategy · Card Game · Casual

Overcooked! 2
Shared: Casual · Co-op · Multiplayer

Tabletop Simulator
Shared: Tabletop · Card Game · Multiplayer

Plants vs. Zombies GOTY Edition
Shared: Strategy · Casual · 2D

Gremlins, Inc.
Shared: Card Game · Strategy · Tabletop

Banana
Shared: Casual · 2D · Family Friendly

Richman10
Shared: Casual · Strategy · Tabletop

Yu-Gi-Oh! Master Duel
Shared: Card Game · Strategy · PvP

Castle Crashers®
Shared: 2D · Co-op · Online Co-Op

Wingspan
Shared: Card Game · Strategy · Casual

Among Us
Shared: 2D · Multiplayer · Online Co-Op

Pit People®
Shared: Strategy · 2D · Online Co-Op

Richman 11
Shared: Casual · Family Friendly · Strategy