[Updated on October 4, 2024, to revise outdated formatting and improve readability.]
To unlock Double Jump in Cyberpunk 2077, you must reach character level 10. And when we talk about character level, we mean in-game level, not street cred. As we said earlier, despite all your services to the residents of Night City, Ripperdoc will not risk its license and will not offer high-level cybernetics while your body is too weak. Of course, you must spend some time to get to the desired level, especially if you have just started a new playthrough. But side quests and part-time jobs will help you relatively quickly jump over this mark.
However, once you meet this requirement, you only need to visit any nearby Ripperdoc and ask about new implants. Next, go to the Legs Cyberware tab and buy Reinforced Tendons by paying the 30,000+ Eddies. It is worth noting that reaching level 10 will unlock other helpful implants like Gorilla Arms. So you might want to hold off on purchasing Double Jump until later.
After installing Reinforced Tendons, you can activate Double Jump by double pressing X/A on a controller or spacebar on a keyboard. This ability will help you quickly climb obstacles or easily evade pursuit by overcoming high fences. On the other hand, this implant works best when paired with other improvements. For example, you can install Sandevistan and a couple of increasing-speed implants. Use everything together, and you will feel like you can fly.
You can use this Cyberware in any speed and agility build like the Katana Build. But you should choose something else if you prefer to be a tank and absorb most of the incoming damage.