For me with 1600 dpi and in game sens 0.7 halo 2 moves about 20 degrees further than halo reach when i move across my mouse mat which is about 55 cm.
And you can’t change your sens between titles like controls, and you don’t even have more than 1 single decimal for sensitivity setting. Terrific. Every FPS I play on PC I have the exact same sensitivity on. Many PC players do. Stop releasing -Yoink- when you can’t uphold any sort of quality control.
Also fix the the audio mixes of halo CE and halo reach.