Death Run 3D by Kevin Wang is a hardcore endless runner built for players who want to be punished. You fly down the inside of a tube while blocks slide across your path, and almost every one of them is moving, so the safe gap you spotted a second ago closes before you get there. The spacing between obstacles is deliberately tight and the tube keeps accelerating the longer you survive, which means your reaction window shrinks the better you do. There are no power-ups, no shields and no second chances - one clipped corner ends the run and drops you straight back to the start. What keeps you coming back is how readable the failure always is: you know exactly which input you mistimed, and you know you can do it right next time. A global leaderboard tracks your best distance, so there is always a number just ahead of yours to chase. If you like high-speed reflex runners, you might also like Tunnel Rush and Slope 3.
Steer left and right with the arrow keys, A and D, or by moving the mouse, keeping your craft lined up with the gap ahead. Look as far down the tube as you can rather than at the block directly in front of you - at high speed, anything you react to up close is already too late. Make small corrections instead of hard swings, because overshooting into the opposite wall is the most common way runs end. The tube speeds up steadily, so treat the early section as a chance to settle into the rhythm before the gaps tighten.
