Games like Holiday Alliance
Games like Holiday Alliance include Plants vs. Zombies GOTY Edition, Bloons TD 6, Kingdom Rush - Tower Defense, Kingdom Rush Frontiers - Tower Defense, and Bloons TD 5. We matched them by the tags players give Holiday Alliance on Steam (Tower Defense, Strategy, Indie, 2D, and Cute): closest matches first, and among equally close ones the better-known games.

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

Bloons TD 6
Shared: Tower Defense · Strategy · Casual

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

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

Bloons TD 5
Shared: Tower Defense · Strategy · 2D

Kingdom Rush 5: Alliance TD
Shared: Tower Defense · Strategy · 2D

Cat Goes Fishing
Shared: 2D · Indie · Cute

Zuma Deluxe
Shared: Strategy · 2D · Cute

Game Dev Tycoon
Shared: Indie · Strategy · 2D

Battle Ranch: Pigs vs Plants
Shared: Strategy · Indie · Tower Defense

Is This Seat Taken?
Shared: Cute · Casual · Cozy

Zero Stress King: Idle Defense
Shared: Tower Defense · Strategy · 2D

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

Relic Guardian - Tower Defense
Shared: Tower Defense · Strategy · 2D

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

Draw & Guess
Shared: Funny · 2D · Casual

Defend Your Life: TD
Shared: Tower Defense · Strategy · Indie

Kabuto Park
Shared: Cute · Cozy · Casual

Pikuniku
Shared: Indie · Cute · Casual

Minami Lane
Shared: Cute · Casual · Indie

Slime Rancher
Shared: Cute · Funny · Colorful

Lil Gator Game
Shared: Cute · Cozy · Casual

Rock 'N' Roll Defense
Shared: Tower Defense · Strategy · Indie

Tangy TD
Shared: Tower Defense · Strategy · 2D