Games like RUN! GRANDPA! RUN!
Games like RUN! GRANDPA! RUN! include Pumpkin Jack, ALTF4, Slime Rancher, Gang Beasts, and Totally Accurate Battle Simulator. We matched them by the tags players give RUN! GRANDPA! RUN! on Steam (Casual, Third Person, Funny, Cartoony, and Colorful): closest matches first, and among equally close ones the better-known games.

Pumpkin Jack
Shared: Colorful · Third Person · Action

ALTF4
Shared: Third Person · Casual · Physics

Slime Rancher
Shared: Funny · Colorful · Casual

Gang Beasts
Shared: Funny · Casual · Action

Totally Accurate Battle Simulator
Shared: Funny · Colorful · Indie

Donut County
Shared: Casual · Funny · Indie

Goat Simulator
Shared: Funny · Casual · Indie

A Hat in Time
Shared: Funny · Colorful · Third Person

Slackers - Carts of Glory
Shared: Casual · Funny · Indie

Chained Together
Shared: Casual · Funny · Adventure

Pikuniku
Shared: Casual · Indie · Funny

Orcs Must Die!
Shared: Third Person · Fantasy · Action

Kingdom Rush - Tower Defense
Shared: Casual · Fantasy · Funny

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

Grand Theft Auto V Legacy
Shared: Third Person · Action · Adventure

Say No! More
Shared: Funny · Casual · Indie

Human Fall Flat
Shared: Funny · Adventure · Physics

Garfield Kart - Furious Racing
Shared: Third Person · Casual · Funny

Three Heroes
Shared: Funny · Fantasy · Third Person

Baby Steps
Shared: Casual · Third Person · Funny

Ratchet & Clank: Rift Apart
Shared: Third Person · Adventure · Cartoony

Another Crab's Treasure
Shared: Funny · Cartoony · Third Person

Witch It
Shared: Casual · Funny · Indie

Lil Gator Game
Shared: Casual · Funny · Colorful