Games like Sixth Force
Games like Sixth Force include It Takes Two, Split Fiction, Trine 3: The Artifacts of Power, Chained Together, and Trine 4: The Nightmare Prince. We matched them by the tags players give Sixth Force on Steam (Local Co-Op, Co-op Campaign, Adventure, Puzzle Platformer, and Online Co-Op): closest matches first, and among equally close ones the better-known games.

It Takes Two
Shared: Co-op · Local Co-Op · Online Co-Op

Split Fiction
Shared: Co-op · Local Co-Op · Online Co-Op

Trine 3: The Artifacts of Power
Shared: Co-op · Puzzle Platformer · Local Co-Op

Chained Together
Shared: Co-op · Adventure · Online Co-Op

Trine 4: The Nightmare Prince
Shared: Local Co-Op · Co-op · Puzzle Platformer

Human Fall Flat
Shared: Co-op · Adventure · Puzzle Platformer

Trine Enchanted Edition
Shared: Puzzle Platformer · Local Co-Op · Action-Adventure

Overcooked! 2
Shared: Local Co-Op · Co-op · Online Co-Op

A Way Out
Shared: Co-op · Local Co-Op · Online Co-Op

PICO PARK
Shared: Co-op · Local Co-Op · Online Co-Op

Resident Evil 5
Shared: Co-op · Co-op Campaign · Online Co-Op

LEGO® Voyagers
Shared: Local Co-Op · Co-op Campaign · Adventure

Trine 2: Complete Story
Shared: Co-op · Puzzle Platformer · Local Co-Op

Castle Crashers®
Shared: Co-op · Online Co-Op · Adventure

PEAK
Shared: Co-op · Adventure · Online Co-Op

Tick Tock: A Tale for Two
Shared: Co-op · Adventure · Online Co-Op

LEGO® Star Wars™ - The Complete Saga
Shared: Co-op · Local Co-Op · Adventure

PHOGS!
Shared: Co-op · Adventure · Local Co-Op

KeyWe
Shared: Co-op · Puzzle Platformer · Co-op Campaign

Resident Evil 6
Shared: Co-op · Co-op Campaign · Online Co-Op

Trailmakers
Shared: Co-op Campaign · Online Co-Op · Adventure

BOKURA
Shared: Co-op · Adventure · Online Co-Op

ibb & obb
Shared: Co-op · Local Co-Op · Online Co-Op

Gang Beasts
Shared: Co-op · Local Co-Op · Local Multiplayer