Games like Zombie Vikings: Stab-a-thon
Games like Zombie Vikings: Stab-a-thon include Brawlhalla, Stick Fight: The Game, Overcooked! 2, TowerFall Ascension, and Broforce. We matched them by the tags players give Zombie Vikings: Stab-a-thon on Steam (Free to Play, Action, Indie, Local Co-Op, and Local Multiplayer): closest matches first, and among equally close ones the better-known games.

Brawlhalla
Shared: Free to Play · Local Multiplayer · Action

Stick Fight: The Game
Shared: Action · Local Multiplayer · 4 Player Local

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

TowerFall Ascension
Shared: Indie · Action · Local Multiplayer

Broforce
Shared: Action · Local Co-Op · Indie

Overcooked
Shared: Local Co-Op · Indie · Local Multiplayer

Move or Die
Shared: Action · Local Multiplayer · Indie

Duck Game
Shared: Action · Local Multiplayer · Indie

SpeedRunners
Shared: Indie · Local Multiplayer · Action

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

Crawl
Shared: Local Multiplayer · Indie · 4 Player Local

Gang Beasts
Shared: Action · Local Multiplayer · Indie

War Thunder
Shared: Free to Play · Action · Free To Play

SMITE®
Shared: Free to Play · Action · Indie

Streets of Rage 4
Shared: Action · Indie · Local Multiplayer

Awesomenauts
Shared: Action · Indie · Local Co-Op

Aimlabs
Shared: Free to Play · Action · Indie

Warframe
Shared: Free to Play · Action · Free To Play

Kopanito All-Stars Soccer
Shared: Action · Indie · Local Multiplayer

Century: Age of Ashes
Shared: Free to Play · Action · Indie

Moving Out
Shared: Action · Indie · Local Co-Op

FORCED: Slightly Better Edition
Shared: Action · Local Co-Op · Indie

Hidden in Plain Sight
Shared: Local Multiplayer · Local Co-Op · 4 Player Local

Bopl Battle
Shared: Action · 4 Player Local · Local Co-Op