What if players can enter in tournaments with their friend, wherein placing first, second, or third earns the player prizes winnings and unlocks? The sparrow racing mode could feature a variety of tracks spanning several different planets. The environments and weather conditions on the planets could pose challenges for players. Imagine sparrow races where players ride through sand and snow storms. It would be amazing to implement earthquakes and tornadoes occurring around them as players race each other. This would be challenging because it could alter the race routes and change in real-time. With the prize money, players can buy upgrades like weapons and tuning parts for their sparrows. Each sparrow could have its own advantages and drawbacks such as regeneration, handling, speed, acceleration and shielding. The Fallen could impede the progress of the racers. They could loot broken buildings and structure, break into the race on their own sparrows or vehicles, trying to hijack players' sparrows. This could be similar the hijack gameplay mechanic in Halo where players were able to kick enemies of their ghosts; stealing their ride. The Fallen could and try to slam racers off the road, and attack racers with firearms. Players can counter by shooting back, slamming in to them or by kicking and punching them if the Fallen enemies get too close to their sparrows. The Fallen could also place sentry turrets that would emerge from underground as racers approach and shoot at them, forcing players to dodge enemy fire. This could be an awesome additional hazard for racers to overcome. XGRA: Extreme G Racing Association is one of my favorite racing games and could serve as a great game reference to draw inspiration from. Now, the Sparrow Racing Mode for Destiny doesn't necessarily need tracks in place because it could be an "open" world racing experience so to speak. The Fallen could place traps on the track for players.