Games like Sheep
Games like Sheep include Portal, Portal 2, Bloons TD 6, Bendy and the Ink Machine, and LIMBO. We matched them by the tags players give Sheep on Steam (Strategy, Puzzle Platformer, Puzzle, Farming Sim, and Cartoony): closest matches first, and among equally close ones the better-known games.

Portal
Shared: Puzzle Platformer · Puzzle · Singleplayer

Portal 2
Shared: Puzzle · Singleplayer · Puzzle Platformer

Bloons TD 6
Shared: Strategy · Singleplayer · Cartoony

Bendy and the Ink Machine
Shared: Puzzle · Singleplayer · Cartoony

LIMBO
Shared: Puzzle Platformer · Puzzle · Singleplayer

Quantum Conundrum
Shared: Puzzle Platformer · Puzzle · Strategy

Viewfinder
Shared: Puzzle Platformer · Puzzle · Singleplayer

Supraland
Shared: Puzzle Platformer · Puzzle · Singleplayer

Plants vs. Zombies GOTY Edition
Shared: Strategy · Singleplayer · Puzzle

Monument Valley
Shared: Puzzle · Singleplayer · Strategy

Mini Metro
Shared: Strategy · Puzzle · Singleplayer

Braid
Shared: Puzzle Platformer · Puzzle · Singleplayer

Little Nightmares
Shared: Puzzle Platformer · Singleplayer · Puzzle

The Bridge
Shared: Puzzle Platformer · Puzzle · Singleplayer

Mini Motorways
Shared: Strategy · Puzzle · Singleplayer

Bridge Constructor Portal
Shared: Strategy · Puzzle · Singleplayer

Little Nightmares II
Shared: Puzzle · Singleplayer · Puzzle Platformer

Kingdom Rush 5: Alliance TD
Shared: Strategy · Singleplayer · Cartoony

Timelie
Shared: Puzzle Platformer · Puzzle · Singleplayer

ISLANDERS
Shared: Strategy · Puzzle · Singleplayer

Bejeweled® 3
Shared: Puzzle · Strategy · Singleplayer

Crazy Machines 3
Shared: Puzzle · Strategy · Singleplayer

Moonleap
Shared: Puzzle Platformer · Puzzle · Strategy

Monument Valley 2
Shared: Strategy · Puzzle · Puzzle Platformer