Fortnite Octane rewards are now available in the popular battle royale game. Epic Games has released yet another Fortnite x Rocket League collaboration, rewarding its players with free cosmetics.A new collaboration brought Fortnite Octane rewards and also added the popular Rocket League vehicle to the battle royale island. The vehicle was only available in Creative mode in the past, but that has changed with the v22.40 update.This article will reveal how to earn all free Fortnite Octane rewards in Chapter 3 Season 4. These rewards look fantastic and will most likely be exclusive to this collaboration, meaning that this could be the only way to get them.Octane is now available in Fortnite's battle royale modesFortnite Octane rewards are now available in the popular battle royale game (Image via Epic Games)Octane is the most popular car in Rocket League, another free-to-play title owned by Epic Games. Earlier this season, the development team released the popular car to Fortnite's Creative mode.The v22.40 update, which dropped on Tuesday, November 15, added the car to classic and Zero Build modes. According to Epic, the car doesn't have all its features in Creative, but it's still perfect.Rocket League@RocketLeague#HighOctane ⛏️6805320#HighOctane ⛏️ https://t.co/rHZlEfMPRk"This Battle Royale/Zero Build version is balanced for these modes, but it still has rocket boosters, supersonic speed, and the ability to jump, double jump, dodge, take flight, and drive on walls!"Due to these fantastic features, Octane is arguably the best vehicle currently available in the video game. However, it will most likely remain in the game for a limited time and won't be available in Chapter 4.How to unlock Fortnite Octane rewardsFour Fortnite Octane rewards can be unlocked by completing new challenges (Image via Epic Games)With the v22.40 update, Epic Games has released 12 new Fortnite x Rocket League challenges.The following are the four free cosmetic items that can be earned by completing them:Back Board back bling - Complete 2 Octane questsOctane Smash spray - Complete 4 Octane questsShot in Flight emoticon - Complete 6 Octane questsClutch Victory pickaxe - Complete 8 Octane questsYou can unlock every cosmetic item from the new collaboration by completing eight out of 12 Octane quests. The quests are relatively easy, but they require you to spend an hour playing the game.The Back Board back bling is one of the Fortnite Octane rewards (Image via Epic Games)The following is a list of all the Octane quests currently available in Fortnite:Fly 100 meters continuously in OctaneEarn 100 Points at RL LiveEarn 250 Points at RL LiveComplete a lap in under 2 minutes 30 seconds in Octane RaceHit three opponents while riding in an OctaneComplete two laps in the Octane racePerform a 720 front or back flip in the air with an OctaneDamage car opponents in Snipers vs OctanesReach each Hardpoint at Rocketeer RuinsFuel up an OctaneEliminate sniper opponents in Snipers vs OctanesCollect eight coins at Rocketeer RuinsAs you can see from the list above, some challenges will require you to join the Creative mode, while some can be completed in Fortnite Battle Royale.