Games like Helpless
Games like Helpless include Banana, Road 96: Mile 0, Submerged, Spirit of the North, and Wuthering Waves. We matched them by the tags players give Helpless on Steam (Free to Play, Casual, Exploration, Walking Simulator, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Banana
Shared: Free to Play · Casual · Singleplayer

Road 96: Mile 0
Shared: Exploration · Choose Your Own Adventure · Walking Simulator

Submerged
Shared: Exploration · Walking Simulator · Casual

Spirit of the North
Shared: Exploration · Casual · Singleplayer

Wuthering Waves
Shared: Free to Play · Exploration · Singleplayer

Caravan SandWitch
Shared: Exploration · Singleplayer · Interactive Fiction

Slime Rancher
Shared: Exploration · Singleplayer · Casual

Fallout 4
Shared: Exploration · Singleplayer · Post-apocalyptic

Firewatch
Shared: Walking Simulator · Exploration · Singleplayer

ABZU
Shared: Exploration · Casual · Singleplayer

DEATH STRANDING DIRECTOR'S CUT
Shared: Walking Simulator · Exploration · Singleplayer

Where Winds Meet
Shared: Free to Play · Singleplayer · Casual

Crimson Desert Enhanced
Shared: Exploration · Singleplayer · Adventure

The Sims™ 4
Shared: Free to Play · Singleplayer · Casual

DAVE THE DIVER
Shared: Casual · Exploration · Singleplayer

Journey
Shared: Exploration · Walking Simulator · Casual

Baby Steps
Shared: Walking Simulator · Exploration · Casual

DEATH STRANDING 2: ON THE BEACH
Shared: Exploration · Walking Simulator · Third Person

Cairn
Shared: Exploration · Singleplayer · Walking Simulator

Stray
Shared: Singleplayer · Exploration · Adventure

Dr. Langeskov, The Tiger, and The Terribly Cursed Emerald: A Whirlwind Heist
Shared: Free to Play · Walking Simulator · Singleplayer

Rise of the Tomb Raider™
Shared: Singleplayer · Exploration · Third Person

Monument Valley
Shared: Casual · Singleplayer · Exploration

Mixtape
Shared: Walking Simulator · Singleplayer · Casual