Assetto Corsa Rally update 0.5 adds Greece, multiplayer phase one, and a physics overhaul

Assetto Corsa Rally 0.5 is live, bringing a new rally location, the first phase of online multiplayer, and a substantial physics update. The official announcement is here in the 0.5 update post.

What changed

Features

Added Rally Greece.
Added Elatia and Loutraki special stages.
Introduced online multiplayer phase one with official and custom ACR lobbies.
Added weekly single-stage events.
Added fresh event groups, snow-condition events, and official multiplayer rotations.

Tracks

Greece includes 2 new special stages, 12 total layout variants, and 22 km of laser-scanned roads with 509 meters of elevation change.
Added dedicated Rally Weekend presets for Greece.
Players can join ongoing lobbies to spectate and view live results.
Lobby owners can change track and weather parameters between races.
Official lobbies are persistent, developer-managed rooms with dynamic scaling for open slots.
Added or scheduled official event rotations including Greek, gravel, tarmac, and wet-condition combinations.
The ideal trajectory system now supports asymmetric paths, currently used on Greece stages.

Physics

Rolled out a major physics overhaul covering all vehicles and terrains.
Updated the tire model, including slip angle behavior, load sensitivity, contact patch calculation, and camber effects.
Refactored surface recognition so each tire uses dedicated parameters per surface.
Added longitudinal and lateral bulldozing effects on soft surfaces.
Reintroduced experimental stick-slip vibrations on high-grip surfaces.
Applied a global tuning pass to surfaces, car physics, and setup presets.

Cars

Added cockpit element vibrations.
Added host options to restrict entries to all cars, same category, or exact same car.
Added a global option to sync camera configuration across all vehicles or only the active car.
Increased default Cockpit and Gauge camera FOV values across all vehicles.
Fixed various vehicle-specific issues and bugs.

Fixes

Fixed terrain flickering in multiple service parks.
Fixed missing tree collision on several stages.
Removed duplicate overlapping trees, with a minor performance improvement.
Fixed floating grass, bushes, and trees across multiple levels.
Improved the ideal line/trajectory on every stage for clearer on-line grip behavior.

We should update our league presets, validate camera/FOV expectations with drivers, and retest pace notes, setups, and car restrictions before running official 0.5 events.

From the changelog

Structured change list parsed from the official notes.

features

[h2]NEW LOCATION[/h2]
Rally Greece, featuring Elatia and Loutraki special stages.
{STEAM_CLAN_IMAGE}/45821329/44cd514ea993836dc61fc3c038bbf3e43b32e5c3.png
{STEAM_CLAN_IMAGE}/45821329/26071c28fc00a290878dfd6643babf3517709c30.jpg
[h2]ONLINE MULTIPLAYER PHASE ONE[/h2]
Official & Custom ACR lobbies, weekly single-stage events
{STEAM_CLAN_IMAGE}/45821329/771a46603dc0543acc41cbc90879657d4ed3f496.png
[h2]NEW EVENTS[/h2]
Fresh event groups, snow-condition events, and official multiplayer rotations.
{STEAM_CLAN_IMAGE}/45821329/6b7995ba00d7bdb5bbdccd2978e8cee7ebdf416e.jpg
[h3]New Content[/h3]
- New Location: Rally Greece

physics

[h2]MAJOR PHYSICS OVERHAUL[/h2]
Updated tire model, surface recognition, bulldozing effects, camber dynamics, vibrations, and global tuning.
{STEAM_CLAN_IMAGE}/45821329/6ac973dea59c901a4bd6f99da5a70f550c930502.jpg
[h3]Physics[/h3]
- Comprehensive Tire Model Improvements:
Revised Peak Slip Angle Formula: Adjusted as a function of load to narrow the variation range. This increases the performance impact of the inner tire, ensuring it acts as a functional gripping tire rather than just a dragging scrub tire.
Revised Load Sensitivity Formula: Enhanced stability under high loads. The formula now dynamically scales based on tire pressure and actual contact patch dimensions.
Refactored Surface Recognition: Every tire now utilizes a dedicated parameter set for each surface type. Individual surfaces can also apply unique modifier overrides to these baseline sets.
Revised Camber Properties: Both camber angle and camber thrust effects are now dynamically load-dependent.
Revised Contact Patch Calculation: Increased sensitivity to camber angles. Excessive camber will now actively reduce longitudinal grip.
Added Bulldozing Effects: Introduced longitudinal and lateral bulldozing physics on soft surfaces. Lateral bulldozing increases with tire slip and decreases with excessive camber. The overall effect scales with specific surface conditions.
Experimental Stick-Slip Vibrations: Re-introduced high-grip surface vibrations.

fixes

[h2]AUDIO, GAMEPLAY, UI, VFX, ENVIRONMENT, BUG FIXES & MORE![/h2]
For more information, head to our website: LINK
Download the update now:
https://store.steampowered.com/app/3917090/Assetto_Corsa_Rally/
[h2]Full Changelog[/h2]
- Service Park Fixes: Resolved terrain flickering issues across multiple service parks.
- Tree Collision Fixes: Fixed missing collision data on several miscellaneous trees across various stages.
- Tree Duplication Fix: Removed overlapping duplicate trees, resulting in a minor performance boost.
- Floating Vegetation Fix: Adjusted placement data to eliminate floating grass, bushes, and trees across multiple levels.
- Improvements to the stages’ ideal line/trajectory: Every stage in Assetto Corsa Rally has been configured with an ideal line or trajectory, providing improved grip when driving on it than when off the line.
[h3]Bug Fixes[/h3]

tracks

Features 2 brand-new, unique Special Stages with 12 total layout variants.
Includes 22 km of high-fidelity, laser-scanned roads spanning 509 meters of elevation change.
- Added dedicated "Rally Weekend" presets tailored specifically for Greece.
- Spectating and Management: Players can join ongoing lobbies mid-match to spectate and view live results, while lobby owners can modify track and weather parameters between races.
[h3]ACR Official Lobbies[/h3]
- Community Spaces: Official Lobbies are persistent, developer-managed rooms created by Supernova that are always visible in the server browser.
- Dynamic Scaling: These official rooms utilize multiple active instances, ensuring there are always open slots for the community.
- Weekly Event 2: Mini Tarmac Festival. Features a selection of 8 tarmac tracks under clear weather conditions, restricted to the Mini Cooper S.
- Weekend Event: Impreza S3 Wales Light Rain. Features a selection of 4 Welsh tracks under wet and light rain conditions, restricted to the Subaru Impreza S3.
[h3]Week 2 Schedule[/h3]
- Weekly Event 1: Alfa GTA Greece Stages. Features a selection of 4 Greek tracks under clear, sunny weather conditions, restricted to the Alfa Romeo GTA 1300 Junior.
- Asymmetric Ideal Trajectory: Upgraded the line technology to support asymmetrical paths, allowing precise control over visual intensity and track placement. This feature is currently exclusive to the Greece stages.

cars

- Core Physics Overhaul: Deployed a major physics update for all vehicles and terrains, highlighted by the introduction of the gravel bulldozing effect.
- Assetto Corsa Rally Events:
[h3]Cars[/h3]
- Cockpit Dynamics: Added realistic vibrations to interior cockpit elements for enhanced immersion.
- Bug Fixes: Resolved various vehicle-specific issues and bugs.
- Global Tuning Pass: Rebalanced all surface properties, car physics, and setup presets to align with the new physics architecture.
- Vehicle and Weather Options: Hosts can restrict car selection to all cars, the same category, or the exact same car, and freely select the weather during lobby creation.
- Weekly Event 1: Rally 2 Greece Special Stages. Features a selection of 4 Greek tracks under clear weather conditions, restricted to Rally 2 category cars.
- Weekly Event 2: Rally 2 Gravel Festival. Features a selection of 8 gravel tracks under clear weather conditions, restricted to Rally 2 category cars.
- Camera Configuration Sync: Added a global option to apply your gameplay camera layout to all vehicles simultaneously or strictly to the currently active car.
- Field of View (FOV) Adjustments: Increased the default FOV setting for the Cockpit and Gauge cameras across all vehicles. Note: Please double-check and readjust your custom camera configurations following this update.
[h3]VFX, Lighting, and Art Direction[/h3]