Last Friday, indie Rocket League developer-publisher revealed its Portal cross-over with nearly 10 new items from Valve’s innovative title. The FREE Portal items in Rocket League will become unlockable Tuesday, December 1.

Obtainable by playing a full game of Rocket League, the official Portal items are potentially rewarded at the end of every match, win or lose. All you have to do is keep playing until the match ends to earn the chance to get a new Aperture-themed goodie of your very own.

What kind of Aperture-themed goodies, you ask?

• Cake (Topper)
• Conversion Gel (Rocket Trail)
• Propulsion Gel (Rocket Trail)
• Repulsion Gel (Rocket Trail)
• Aperture Laboratories (Antenna)
• Cake Sticker (Antenna)
• Companion Cube (Antenna)
• Personality Core (Antenna)
• PotatOS (Antenna)