Human Fall Flat+

Human: Fall Flat+ gives its multiplayer pitch a concrete object: a boulder that needs to get onto a catapult. The official iOS description offers that as an example of asking for help in its physics puzzles, alongside solo play and online groups of up to four.

The example makes cooperation about handling the environment. Another player can participate in the same physical task, rather than merely pursue a separate objective nearby. It does not prove the boulder requires two people; the listing explicitly offers a solo game too.

Multiple routes through a level add a reason to examine alternatives before treating the first apparent solution as compulsory. If you like co-op for the process of getting an awkward object to behave, investigate that shared task. The advertised invitation is specific enough: another pair of hands may be useful before anyone has agreed where the boulder should go.