Games like Do NOT say 21!
Games like Do NOT say 21! include Muse Dash, Banner of the Maid, 60 Seconds! Reatomized, 100% Orange Juice, and Kingdom Rush - Tower Defense. We matched them by the tags players give Do NOT say 21! on Steam (Turn-Based Tactics, Anime, Female Protagonist, Strategy, and Word Game): closest matches first, and among equally close ones the better-known games.

Muse Dash
Shared: Anime · Female Protagonist · Casual

Banner of the Maid
Shared: Turn-Based Tactics · Strategy · Female Protagonist

60 Seconds! Reatomized
Shared: Turn-Based Tactics · Strategy · 2D

100% Orange Juice
Shared: Anime · Strategy · Casual

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

Far Away
Shared: Word Game · Female Protagonist · Anime

Plague Inc: Evolved
Shared: Strategy · Casual · Indie

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

XCOM®: Chimera Squad
Shared: Turn-Based Tactics · Strategy · Singleplayer

Mirror 2: Project X
Shared: Anime · Female Protagonist · Casual

Othercide
Shared: Turn-Based Tactics · Strategy · Female Protagonist

ICEY
Shared: Anime · Female Protagonist · 2D

The Last Spell
Shared: Strategy · Turn-Based Tactics · Tactical

Your Only Move Is HUSTLE
Shared: Strategy · Turn-Based Tactics · 2D

XCOM 2
Shared: Strategy · Turn-Based Tactics · Tactical

挂机神话
Shared: Word Game · Strategy · Casual

Your Mother
Shared: Anime · Female Protagonist · 2D

Vanguard Princess
Shared: Anime · Female Protagonist · Casual

大侠请重来
Shared: Turn-Based Tactics · Casual · Word Game

Journey of Realm:Dawn Dew
Shared: Turn-Based Tactics · Female Protagonist · Strategy

The WereCleaner
Shared: Casual · Strategy · Arcade

60 Seconds!
Shared: Turn-Based Tactics · Strategy · Text-Based

Volcano Princess
Shared: Female Protagonist · Anime · Strategy

Game Dev Tycoon
Shared: Strategy · Casual · 2D