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Bennett Foddy thinks his friends might be dead. We call down to the forest floor from atop a mossy boulder and wait to see if either of our co-op climbing buddies respond.

"Yeah, sorry guys," we hear Emeric Thoa speak up. "I was being rescued by Holly because I died or fell or passed out. I don't know... I was witnessing the whole thing from my dead body."

Emeric is not dead, thankfully. But he is badly ill. Spore blasts and falls have taken their toll on his big-headed orange body, reducing his stamina meter a lot. This is where Peak's many items and gizmos may come in handy. Bandages will heal wounds, for example, while others might help with ascending unscaleable walls, such as the small circus cannon Holly Jencka has quietly stashed in her backpack. It's a familiar concept to these bleeding, aching game designers: resource management.

"There is a little bit of

We finally reach the summit of the first mountain. Holly Jencka, Emeric Thoa and I gather by the fire as Bennett Foddy talks about random generation and orthodox versus unorthodox game design. You can tell this man is a professor. I feel like I am getting a university class for less than the thousands of pounds of debt it would otherwise cost. I forcefeed him a roast marshmallow but he keeps talking. 

Meanwhile, Holly charges towards the Roots. This is Peak's newest biome, a dense forest of spiders, poisonous mushrooms, exploding spore pods, and other fungal threats. I follow dutifully, asking more questions as random gusts of wind whip through the canopy.

The geometry and layout of every island in Peak is procedurally generated, which means some might be wildly more tough than others. Again, this devotion to randomness is something the three developers haven't necessarily pursued.

"When we started [with White Knuckle]," says Holly, "we considered: do we want to do fully procedural level generation? But it is really quite difficult.

Holly Jencka stuffs girl scout cookies into Bennett Foddy's mouth. She turns and marches on, looking at a rickety-looking rope bridge ahead of us.

"Okay," she says. "We should only do this bridge one at a time... because they have a tendency of collapsing."

We make it over one by one. If we'd tried crossing all at once the bridge would possibly give way under the combined weight of our cartoonishly large heads. It's good to have Holly here, someone who has played Peak more than the rest of us. But this kind of high-stakes multiplayer camaraderie, sometimes lovingly referred to as "friendslop", isn't actually a factor in the games created by these developers. They all make single player stuff. That means their own games feel quite different.

"That sense of isolation adds a lot to the somber mood I think a lot of climbing games have," says Holly. "This game, you don't really feel it, because you're goofing off with three other people but... I think any of the games all of us have made you get this melancholy

In Peak, you reach out your hands to grab onto surfaces. Holding left click against a wall or a tree sees you climb, but your stamina bar will drain quickly. Thankfully, players can offer an arm to hoist up a fellow climber in a difficult spot. You'll need to boost and help each other out a lot to reach the summit. It's a good thing the three game developers I have roped into this horrendous jaunt seem to be good at working together.

"I think when you talk about climbing, you're talking about a very strenuous sort of activity," says Holly, plucking fruit from a shrub growing on the side of a cliff and pocketing it for a future snack. "You're talking about this very physical thing. And giving your player character a physical body that obeys some rules of reality helps the feeling of climbing become more real in a sense, right?"

Over the course of a climb in Peak, your stamina bar will become afflicted with all sorts of clutter that reduces how much energy you have - injuries, burns, sleepiness - all reducing

"So, I assume the task is to climb that giant peak up there."

I look at the mountain and tell Bennett Foddy he is correct. The creator of Getting Over It and co-developer of Baby Steps has agreed to my unusual journalistic request. He must conquer a mountain in co-op climbing game Peak and answer my questions while doing it. And he won't be ascending alone. With us on the beach at the foot of this mountain are two other hardened developers of climbing games. Holly Jencka, lead developer of urban clambering sim White Knuckle. And Emeric Thoa, creative director of sci-fi alpine sim Cairn. They are currently rummaging through suitcases and collecting coconuts. I don't say it out loud but I have a strong feeling none of them will survive.

After messing about on the beach for a few minutes, I tell the trio they're "on their own". I'll be following, but mostly hanging back and asking questions. I want to see how three developers of climbing games will manage when faced with a mountain not of their own making. Maybe we'll uncover gems of game design wisdom along the way.