Games like Number Wars
Games like Number Wars include SUPER CHICKEN JUMPER, Disney Speedstorm, SMITE 2, Vampire Survivors, and Kao the Kangaroo: Round 2 (2003 re-release). We matched them by the tags players give Number Wars on Steam (Casual, Action, Strategy, Adventure, and Racing): closest matches first, and among equally close ones the better-known games.

SUPER CHICKEN JUMPER
Shared: Arcade · Action-Adventure · Action

Disney Speedstorm
Shared: Action · Racing · Casual

SMITE 2
Shared: Action · Strategy · Casual

Vampire Survivors
Shared: Action Roguelike · Casual · Action

Kao the Kangaroo: Round 2 (2003 re-release)
Shared: Action · Casual · Adventure

Where Winds Meet
Shared: Adventure · Action-Adventure · Casual

Demon Slayer -Kimetsu no Yaiba- The Hinokami Chronicles
Shared: Action · Adventure · Action-Adventure

BlazBlue Entropy Effect
Shared: Action · Action Roguelike · Action-Adventure

UFO 50
Shared: Action · Strategy · Adventure

The WereCleaner
Shared: Casual · Strategy · Arcade

Kingdom Rush - Tower Defense
Shared: Strategy · Casual · Action

Marvel Rivals
Shared: Action · Casual · Adventure

Judgment
Shared: Action · Adventure · Action-Adventure

Juicy Realm
Shared: Action · Adventure · Casual

DJMAX RESPECT V
Shared: Casual · Action · Anime

Touhou Big Big Battle
Shared: Strategy · Casual · Action

Megabonk
Shared: Action Roguelike · Action · Casual

PUBG: BATTLEGROUNDS
Shared: Action · Battle Royale · Strategy

Need for Speed™ Heat
Shared: Racing · Action · Adventure

Skul: The Hero Slayer
Shared: Action · Action Roguelike · Indie

Need for Speed™ Unbound
Shared: Racing · Action · Casual

Hitler Waifu
Shared: Casual · Action · Adventure

Notes of Soul
Shared: Action · Adventure · Casual

Crab Champions
Shared: Action Roguelike · Arcade · Casual