Raft

Raft is an ocean survival game from Redbeet Interactive, published by Axolot Games. You wake up on a tiny raft in the middle of an endless sea with no land in sight, thirsty, hungry and armed with a hook made of old plastic. Whatever you manage to fish out of the water goes toward staying alive.

You collect debris floating by, use it to build and expand your raft, make food, water and tools, and then set sail for dangerous forgotten islands. Sharks that like to bite the raft loom over all of this. The game can be played alone or with friends.

The story takes about 27 hours, and a 100% run about 79 hours (according to HowLongToBeat). At 2 hours a day, a month covers the main story but not full completion. The rental is offline-only, so you play alone, without online co-op.