10 Most Stressful Video Game Levels

10. Subnautica: Blood Kelp Zone

When diving into the beautiful world of Subnautica for the first time, players are presented with an aquatic alien world bursting with colour and brimming with strange creatures. The opening hours of this survival game is like taking a snorkeling holiday to a tropical location.

But when players have scavenged enough materials to dive further into this world to uncover more of the mysteries it hides, they'll quickly learn that there's a lot of monstrous terrors lurking in the murky depths to be frightened of.

Bonesharks, crabsnakes, and the fearsome reapers are just some of the wildlife to keep you on your toes at the initial stages. But these are small fish in comparison to what awaits in the Blood Kelp Zone.

Upon approaching this area for the first time, the player's PDA will announce that this area contains many of the "preconditions for stimulating terror in humans", and it's not wrong.

Ghostly luminous kelp is the only natural light players will have to navigate the claustrophobic caves and trenches with. Meanwhile, an ominous soundtrack with a pulsating rhythm warns that there's more danger ahead.

The threatening atmosphere isn't without merit. The dreaded ghost leviathan roams this area, making any excursion to this zone a stressful ordeal.