Summary

Skijoring is a co-op skiing game for 2 players made in Unreal Engine 5.6. Inspired by classic arcade racers and the real-life sport of skijoring, it lets players show off - or wipe out - while outrunning a deadly avalanche.

The project started as my team’s game for Amazing Seasun’s SEED Jam internship in July 2025.
We continued to work on it through December 2025 to create a more complete experience.

Overview

Timeline

June 2025 - December 2025
(6 months)

Role

Project Lead

Tools

Unreal Engine 5.6

Figma & Notion

Team

9 team members

Table of Contents

Project Goals

  • Bring out teamwork and the bond between players

  • Capture the stylish moves and wild wipeouts of skijoring

  • Create carefree, pick-up-and-play fun

My Contributions

    • Designed 2 characters with unique roles.

    • Implemented 3Cs, state machines, VFX, and tricks.

    • Carefully refined the feel of steering, boosts, turns, and airtime.

  • Delivered 5 levels, making reference boards, briefs, top-downs, rough layouts, PCG tools, and set-dressing and lighting spaces.

    • Led weekly standups, design reviews, and playtests for a team of 9.

    • Documented level design process and tools for designers and artists.

    • Scripted both characters and all interactables in Blueprint.

    • Created level set-pieces and transitions in Sequencer.

    • Implemented online multiplayer with Online Subsystem Steam.

Gameplay Reel

Gameplay Design Breakdown

Why should players work together?

We knew we wanted to make a co-op racer, but didn’t know of any games that had pulled it off.

We knew what we didn’t like: hot-seat or combined-input approaches that robbed players of control, as in Mario Kart: Double Dash!! (hot seat) or the Mario Kart: Bowser’s Challenge ride at Universal (combined-input). Co-op always felt like an afterthought.

From the outset, giving players ways to affect each other and a motive to work together without sacrificing individual control were the goals of our loop.

In the short and long-term, Skier and Snowmobiler had to matter to each other and retain their agency.

Core Loop

From moment to moment, Snowmobiler drags Skier. Skier reacts to the obstacles approaching them + Snowmo’s path.

Track Loop

As players progress on a track, Skier does tricks and hits slaloms to earn boosts for Snowmo.

Iterations - Snowmobiler

Snowmobiler took up a lot of my focus early on. Since his movement directly affected Skier, he needed solid handling and feedback, as well as motives to create interesting gameplay moments for Skier.

  • Basic controls for Snowmobiler to test pulling Skier. Skier uses a character controller, Snowmo is physics-based.

    On controller, Snowmobiler only used left analog for steering and throttle. Snowmobiler could not turn from a standstill.

    Playtesters found this version slippery and unintuitive. Hill climbs and turning were difficult, and Snowmobiler felt unresponsive.

  • To keep turning consistent and intentional, I moved throttle to a separate button and scaled the strength of Snowmo’s turn over time. This allowed quick, precise turns without Snowmo feeling slippery.

    I changed Snowmo’s physics material, taking a low blend of Snowmo’s friction to expedite turning and climbing steep hills.

    Turning was refactored to use angular velocity instead of torque. Braking and reverse were added here.

  • Players liked the improved turning, but Snowmo still felt stilted relative to the environment.

    Camera lag removed the camera jitter on rough surfaces. Changing the snowmobile’s roll to match surfaces made movement more stable and the camera more dynamic.

  • Jumps felt a bit anticlimactic for Snowmo, especially since Skier tricks were in. As a hero feature of skiing games, jumps needed some work.

    Inspired by SSX and Crash Team Racing, I gave Snowmobiler boosts after airtime to reward setting up tricks for Skier. Giving boosts their own trick animation made the effect clear.

  • Initially, our split-screen was horizontal to show more space around each player, with the camera pulled in to highlight characters.

    We switched to vertical split-screen to highlight verticality. Camera shifts during airtime and boosts let us focus on tricks, but show more environment

  • Snowmobiler worked well, but had one problem:

    You couldn’t see the Skier! It felt like you were playing the game alone. This was especially bad in online, where screen-peeking wasn’t possible.

    I added a render target widget to show a view of Skier, but left it as an option due to the potential performance cost.

Iterations - Skier

Skier went through several revisions to reach a level of agency and involvement on par with Snowmobiler.

While Snowmo focused more on the path in macro, Skier centered on style, reaction, and moment-to-moment flow.

  • First draft with Skier turning, jumping, and matching terrain tilt.

    Skier could hit slaloms, but there wasn’t a motive to jump.

    Skier’s camera didn’t show the space ahead, and the implementation for the rope restricted movement.

    Worst of all, Skier would often clip through terrain and walls.

  • To prevent clipping or holding up Snowmo, I added crash detection for Skier and made him ragdoll on crash. This alone made the game twice as fun - there was more interplay between players.

    Tricks and combos made tall jumps more rewarding, but boiled down to button-mashing at first.

    Skier still had little impact on Snowmobiler beyond slaloms.

  • Inspired by Burnout and SSX Tricky, I added the RAD system to motivate tricking. I added stale tricks, requiring more intentional tricking for RAD. Skier now had a definite, intuitive impact on speed.

    To give Skier more freedom while steering, I increased his maximum step angle and added some “tension“ to the rope - Skier has some leeway beyond the rope’s set bounds, but gets heavier resistance the further out he is from Snowmo.

  • Players were having trouble understanding slaloms, especially who could gain slaloms and whether points were from tricks or slaloms.

    I added a widget callout for slalom pickup, showing the slalom icon to differentiate it from the trick callout.

    Showing the same icon on slaloms, gates, and the UI created a clear language for the feature.

  • Players felt Skier was still a little inconsequential. Snowmo had a way to directly move Skier, but Skier couldn’t affect Snowmo.

    Yoink resolved this: every few seconds, players can pull each other along the rope. Skier could now save Snowmo from cliffs, troll the other player, or do elaborate shortcuts and tricks.

  • Skier was now on par with Snowmo, but something felt off.


    A few testers noticed they couldn’t consistently see Snowmo over Skier. Dithering felt like a shoddy fix - seeing Skier pull off tricks was a core feature.

    I pulled out the camera and made Skier snap to the terrain’s roll rotation to show Snowmo more often.

    Pulling the camera out during long jumps improved visibility and the feel of boosts. Bobbing the camera from a pull-in during a boost to a faraway shot when jumping really sold the central push and pull.

Level Design Breakdown

Goals

  • Identity

    Each level needed a reason to exist, a strong core concept, and a distinct visual identity.

    Starting with briefs and top-downs let us get the key ideas down first and vet levels before honing each concept.

  • Replayability

    We set out to make each track replayable and polished, rather than going for sheer track count.

    I admired SSX’s multiple routes per track, as well as Mario Kart Wii’s balanced shortcuts.

  • Dynamism

    Making each track feel alive was a top priority.

    Moving elements, varied beats and set-pieces, and varied racing lines kept things fresh moment-to-moment.

Process

  • 1. Briefs & Top-Downs

    Each level starts with a brief, reference list, and top-down.

    I collaborated with the LD team to compose in Figma, starting with a track layout and visual concept before marking up elevation and beats.

  • 2. Rough Layouts & PCG

    Top-downs are translated to in-engine roughs using landscape splines to create quick playable spaces. PCG is drafted here to break up the track and create broad bounds.

  • 3. Interactables Pass

    Once a track is proven out in macro, interactables like slaloms, ramps, and obstacles are placed.

    We playtest this micro pass to refine our racing line and micro flow.

  • 4. Foliage, Lighting, & Dressing Pass

    Foliage, lighting, and props are added to nail down visuals in micro and create a clearer contrast between track and offroad.

    Optimization passes and track smoothing start here.

  • 5. Sequencing, Collectibles & Data Pass

    Transitions, moving elements, and one-off level details are added in Sequencer. Collectibles and secrets are placed in the locked layout, since level flow is finalized.

    Data for rankings and BLACK DIAMOND challenge mode is added using representative run times.

Heuristics

  • Visual Layout Rules

    • Since snow and ice have fairly uniform color at base, textures and imperfections need to be blended in to break up landscapes.

    • Points of reference break up track and make readable patches of positive and negative space. Foliage and PCG enhance the sense of speed with parallaxing and size change.

    • Texture painting, PCG, props, and movement lead the player’s path down the track. Depth and verticality are exaggerated over track width.

  • Verticality

    • Downhill creates speed and visibility, while uphill limits it.

    • Longer jumps punctuate each track, creating vistas and tense moments.

    • Slope and track camber both guide the racing line and create verticality without much elevation change.

  • Pathing, Path Balancing, & Shortcuts

    • Moving in a straight line is not fun. Obstacle placement motivates movement and turns + jumps break up straightaways for more involved racing lines.

    • Jumps have to deliver speed to make up for the extra distance.

    • Paths contain equal slalom counts, and are generally the same length. Shortcuts have trade-offs in rankings.

    • Shortcuts and skips cannot cut out large swathes of the track, unless they’re difficult to see and pull off.