Thanks to Action Replay Wizard, Josh_7774, we have a code that completely removes the white damage flash from on-foot missions. This graphical effect was controversial even during development but somehow made it into the final game despite its strobe-like effect when being shot by multiple enemies.
You will find the code for Dolphin and consoles on the Resources page in the Quality of Life AR Codes download. Use of the this code in speedruns is not only allowed but encouraged so that all viewers can enjoy the game without eye fatigue and headaches.
It's very clear that the primary challenge that the developers of Agent Under Fire wanted the player to partake in was obtaining high scores. You need high scores to unlock single and multiplayer rewards and your highest scores are saved and displayed under each mission. Naturally, the beginnings of