Games like Protect Your Humans
Games like Protect Your Humans include Lovers in a Dangerous Spacetime, HYPERCHARGE: Unboxed, Vampire Survivors, BALL x PIT, and Sky Force Reloaded. We matched them by the tags players give Protect Your Humans on Steam (Shoot 'Em Up, 4 Player Local, Co-op Campaign, Local Co-Op, and Local Multiplayer): closest matches first, and among equally close ones the better-known games.

Lovers in a Dangerous Spacetime
Shared: 4 Player Local · Local Co-Op · Local Multiplayer

HYPERCHARGE: Unboxed
Shared: Co-op Campaign · Action-Adventure · Local Co-Op

Vampire Survivors
Shared: Bullet Hell · Pixel Graphics · Singleplayer

BALL x PIT
Shared: Shoot 'Em Up · Bullet Hell · Action

Sky Force Reloaded
Shared: Shoot 'Em Up · Local Co-Op · Bullet Hell

Jamestown
Shared: Shoot 'Em Up · Local Co-Op · Bullet Hell

Crawl
Shared: 4 Player Local · Local Multiplayer · Local Co-Op

Castle Crashers®
Shared: 4 Player Local · Local Co-Op · 2D

Duck Game
Shared: Local Multiplayer · 4 Player Local · Pixel Graphics

Sonic Racing: CrossWorlds
Shared: Local Multiplayer · Action-Adventure · Local Co-Op

Trine 4: The Nightmare Prince
Shared: Local Co-Op · Action-Adventure · Co-op Campaign

It Takes Two
Shared: Local Co-Op · Co-op Campaign · Local Multiplayer

Stick Fight: The Game
Shared: Local Multiplayer · 4 Player Local · Local Co-Op

Overcooked
Shared: Local Co-Op · 4 Player Local · Local Multiplayer

Enter the Gungeon
Shared: Bullet Hell · Local Co-Op · Pixel Graphics

Split Fiction
Shared: Local Co-Op · Action-Adventure · Co-op Campaign

Broforce
Shared: Local Co-Op · Pixel Graphics · Local Multiplayer

Teenage Mutant Ninja Turtles: Shredder's Revenge
Shared: Co-op Campaign · Action-Adventure · Pixel Graphics

Rayman® Legends
Shared: Local Co-Op · 4 Player Local · Local Multiplayer

Overcooked! 2
Shared: Local Co-Op · 4 Player Local · Local Multiplayer

TowerFall Ascension
Shared: Local Multiplayer · Local Co-Op · 4 Player Local

DARIUSBURST Chronicle Saviours
Shared: Shoot 'Em Up · 4 Player Local · Local Co-Op

Barony
Shared: Local Multiplayer · Local Co-Op · 4 Player Local

Revolution Ace
Shared: Shoot 'Em Up · Local Co-Op · Bullet Hell