Forza Horizon 6 Series 4: Mascot Party Release Date, New Cars, and Time Attack

Summary: The highly anticipated Forza Horizon 6 Series 4 update, officially titled "Mascot Party," is locked in for a global release on Thursday, August 13, 2026. Following the massive success of the Series 3 Italian Supercars month, Playground Games is shifting gears to celebrate a vibrant festival atmosphere across the open-world Japan map.

This major monthly patch introduces highly requested JDM models, fresh Festival Playlist reward tiers, and an unannounced "Evolving World Time Attack" gameplay mechanic that has data miners buzzing. Players looking to expand their garages with the latest Forza Horizon 6 Cars will have plenty of new rewards to chase throughout the season.

Below is everything leaked and confirmed so far for the Forza Horizon 6 Series 4 launch.

Forza Horizon 6 Series 4 Release Date & Maintenance Schedule

Playground Games follows a strict deployment schedule for its post-launch content. According to early platform patch logs, the rollout times are as follows:

Content Patch Download

Tuesday, August 11, 2026, at 17:00 UTC

Adds game assets and stability fixes.

Series 4 Live Transition

Thursday, August 13, 2026, at 14:30 UTC

The official launch of the Summer "Mascot Party" Festival Playlist.

Players on Xbox Series X|S and PC will need approximately 14GB of free storage space to install the update.

Leaked & Confirmed Series 4 New Cars List

The core appeal of any new Forza Horizon series is the injection of fresh machinery into the Autoshow and Festival Playlist. Data miners dissecting the August pre-patch files have revealed a heavy focus on quirky car subcultures and legendary Japanese tuners to match the "Mascot Party" theme.

2026 Toyota GR Prius Performance

Availability: Series 4 Overall Progress (80 Points)

Expected Rarity: Exclusive Promo

1998 Suzuki Cappuccino (Custom Widebody)

Availability: Summer Week 1 - 20 Points Reward

Expected Rarity: Hard to Find

2024 Honda Civic Type R (FL5) Mugen

Availability: Autumn Week 2 - 20 Points Reward

Expected Rarity: Exclusive Promo

2025 Mazda Spirit Racing 3 Concept

Availability: Winter Week 3 - 40 Points Reward

Expected Rarity: Hard to Find

1992 Autozam AZ-1 (Mascot Edition)

Availability: Spring Week 4 - 20 Points Reward

Expected Rarity: Seasonal Special

Note: The Autozam AZ-1 will feature a unique "Mascot" collectible livery pre-installed, tying directly into the seasonal showcase events.

New Feature: Evolving World Time Attack

Beyond collectible cars, Series 4 serves as the launchpad for a major technical expansion called Evolving World Time Attack.

This feature ties directly into the upcoming hype surrounding the Xbox Gamescom 2026 showcase, where Playground Games is expected to unveil a massive late-year expansion.

In Series 4, players will notice new dynamic leaderboard markers appearing on mountain touge passes across Japan.

Every real-world day, the atmospheric conditions-including fog density, track surface moisture, and wind speed-on these specific routes will change procedurally.

Players must build custom tuning profiles to adapt to these shifting environments and shave milliseconds off their global rivals' times to secure exclusive badges and seasonal credits.

Festival Playlist Highlights & Mascot Collectibles

To progress through the Series 4 reward tracks, drivers will participate in custom-themed PR stunts, championships, and a fresh Horizon Stories arc.

The Mascot Treasure Hunt

Week 1 kicks off with a massive hunt across Tokyo's neon districts to find hidden giant cat-mascot statues.

Solving the riddle awards:

3 Festival Playlist Points

100,000 Credits

Themed EventLab Blueprints

Playground Games has whitelisted over 15 community-made custom race tracks featuring giant arcade obstacles, loop-de-loops, and drift corridors designed around classic Japanese arcade iconography.

Make sure to wrap up your remaining Series 3 championships before August 13 to claim any leftover Italian exotics before they disappear into the hard-to-find Auction House market rotation.