Changelog:

4 NEW RACING TRACKS 1 NEW DERBY ARENA

• Clayridge Circuit
• Deathloop -Northfolk Ring (two routes) -Dirt Devil Stadium (Speedway) -Dirt Devil Stadium (Derby Arena)

5 NEW VEHICLES

• Venom (career reward)
• Stretch Limousine
• Couch Car
• Motorhome
• Big Rig

CAREER ENHANCEMENTS

• Several new career events and challenges featuring new tracks and vehicles. Check each Championship for new events – for example the first championship Regional Juniors now has the Couch Craze challenge to unlock this vehicle.
• There's now more variation in the computer-controlled AI cars, and they will also make use of the upgrade parts to make your life so much more miserable.
• Many events have been changed and tweaked to offer more engaging, balanced gameplay experience.
• Also, achieved bonus targets are no longer reset when restarting a career series.

GAME IMPROVEMENTS

• Polished and more detailed environments.
• Animated objects such as flags and balloons.
• New paint jobs for most vehicles.
• Collision improvements: the cars no longer clip each other.
• Quick match functinality for multiplayer.
• Streamlined server browser.
• Overhauled server lobby user interface and improved usability.
• Improved car and upgrade selection in the garage/pit.
• New daytimes for many tracks.
• Improved career menu screens.
• Multiplayer: Bots now get auto-kicked also during races if a human player joins and takes their slot.
• Multiplayer: At event start, players not ready won't be kicked as long as they have a valid car.
• New track and event specific loading screens.
• A save data backup is created automatically whenever the game is updated.
• Minimap (can be disabled in the Settings menu).

PERFORMANCE OPTIMIZATIONS

• Overall game performance increased especially for older PCs.
• Multiplayer better optimized for poor connections and PCs.
• Drastically reduced loading times for all tracks.
• Server side: hardware and bandwidth demands reduced.

BUGFIXES

• Numerous bugfixes, tweaks and improvements, many based on the feedback we've received from you. As always, thanks for your continuing support and keep those suggestions coming!

In other news, the Season Pass granting you access to wild and wacky content will become available today as well! All content will be released post launch of Wreckfest, over the course of 8 DLC packs, with the first packs launching in September. As a special bonus, anyone who purchases the Season Pass will also receive the coveted Bandit V8 Ripper!

Source and more info