Games like Jamsouls
Games like Jamsouls include Broforce, Cuphead, Risk of Rain (2013), Awesomenauts, and Spelunky. We matched them by the tags players give Jamsouls on Steam (Action, Indie, Local Co-Op, and Platformer): closest matches first, and among equally close ones the better-known games.

Broforce
Shared: Action · Local Co-Op · Platformer

Cuphead
Shared: Platformer · Local Co-Op · Indie

Risk of Rain (2013)
Shared: Indie · Action · Platformer

Awesomenauts
Shared: Action · Platformer · Indie

Spelunky
Shared: Platformer · Indie · Local Co-Op

Skul: The Hero Slayer
Shared: Action · Indie · Platformer

Guacamelee! Gold Edition
Shared: Action · Indie · Platformer

Rocketbirds: Hardboiled Chicken
Shared: Indie · Action · Platformer

Shank
Shared: Action · Indie · Local Co-Op

Dust: An Elysian Tail
Shared: Action · Indie · Platformer

Katana ZERO
Shared: Action · Platformer · Indie

BADLAND: Game of the Year Edition
Shared: Indie · Action · Local Co-Op

TowerFall Ascension
Shared: Indie · Action · Local Co-Op

Shank 2
Shared: Action · Indie · Local Co-Op

Rogue Legacy
Shared: Indie · Platformer · Action

Never Alone (Kisima Ingitchuna)
Shared: Indie · Local Co-Op · Platformer

20XX
Shared: Action · Platformer · Indie

My Friend Pedro
Shared: Action · Indie · Platformer

Rayman® Legends
Shared: Action · Platformer · Local Co-Op

Spelunky 2
Shared: Platformer · Indie · Local Co-Op

SpeedRunners
Shared: Indie · Action · Platformer

Hollow Knight
Shared: Platformer · Indie · Action

Bleed
Shared: Action · Indie · Platformer

Deadlight
Shared: Action · Indie · Platformer