This issue is meant to log most frame rate issues in the game, for ease of access

Unresolved issues

Code issues

• The game gradually speeds up at frame rates past 300-310;
• NPCs AI gradually breaks (e.g. Enemies stay in cover more) at frame rates past 30;
• Player/NPC pathfinding breaks at frame rates past 30;
• The "Rolled Over" achievement becomes harder to achieve at frame rates past 30; Dubious
• Vehicles break in various ways (e.g. Cars become harder to maneuver, bikes slide faster, boats become slower) at frame rates past 30;
• Clip capturing time gets limited at frame rates past 30;
• Camera events (e.g. Camera shake in first person "hood" mode) animate faster at frame rates past 30;

UI issues

• Police blips on the pause menu map animate faster at frame rates past 30;
• Loading screen elements' scale/speed break (Are probably a little broken to begin with on PC) at frame rates past 30;
• Radio HUD logos animate faster at frame rates past 30; Dubious

Script issues

Note: Latest FusionFix versions automatically limit some of the affected minigames to 30 fps, so they play as intended.

• Phone camera zooming speeds up at frame rates past 30;
• The mouse cursor for in-game computers becomes slower on mouse at frame rates past 30;
• Scrolling web pages on in-game computers becomes faster on gamepad stick, and on mouse it's a bit fast at frame rates past 30;
• E-mail writing speed becomes faster at frame rates past 30;
• Binocular camera panning speeds up on gamepad at frame rates past 30;
• Binocular camera zooming speeds up at frame rates past 30;
• Pool physics break at frame rates past 30;
• Dart aim shake intensity becomes weaker at frame rates past 30;
• TBoGT's drinking minigame expects faster input at frame rates past 30;
• Weapon select animations in Jacob's, Terry's or Armando's gun vans speed up at frame rates past 30;
• The QTE while climbing the truck in the mission "Truck Hustle" becomes slightly harder at frame rates past 30;
• Arm Wrestling in TLAD becomes harder to complete at frame rates past 30;
• In the mission "Action/Reaction" in TLAD, the burning AoD won't trip down to the stairs at frame rates past 30;
• Air Hockey in TBoGT breaks at frame rates past 30;

Possible script issues:

• Racing timers slightly become slower at frame rates past 30;
• In the mission "Caught With Your Pants Down" in TBoGT, the ropes slightly "detach" from the Skylift's magnet, and likewise the sniper might become less accurate at frame rates past 30;

Fixed/Worked-around issues in FusionFix

• Cutscenes zoom-in/out at frame rates past 30;
• Characters tremble/jitter in cutscenes at frame rates past 30; Mostly/Partially
• Bikes slide faster at frame rates past 30; Partially
• Mouse deadzone becomes higher at frame rates past 30;
• Camera auto-centering force in vehicles breaks at frame rates past 30;
• On foot camera shake force and speed breaks at frame rates past 30;
• Handbrake Cam force breaks on gamepads at frame rates past 30;
• Camera zooming sequences in the mission "It's Your Call" speed up at frame rates past 30; Script issue with code fix

UI issues

• Loading text/sparks animate faster at frame rates past 30;
• CD spinners (e.g. Those showing up after saving/loading the game) animate faster at frame rates past 30 (Only the one for saving was fixed, but the one for loading is skipped with FusionFix for faster save game loading)
• Police blips on the in-game radar animate faster at frame rates past 30;

Script issues

• In the missions "Out of Commission" and "A Revenger's Tragedy", the QTE becomes harder to pass at frame rates past 30;
• Little Jacob crashes his helicopter into a building in the mission "A Revenger's Tragedy", at frame rates past 30;

Native function issues

Because the SLIDE_OBJECT native function has speed parameters that aren't normally scaled by the game's time step/frame time, the following objects/missions are affected if the frame rate doesn't match 30 fps:

• The elevator doors in the mission "Late Checkout" open/close faster, and likewise the elevator itself ascends too fast for the camera in this scene to keep up with it, breaking it;
• Garage doors in general open/close faster, and as a result, in the mission "Easy as can be", in the last scene the garage doors close before the player gets out, softlocking it;
• Sliding gates (e.g. Those from Port Tudor) open/close faster;
• Window cleaning platforms/cradles ascend/descend faster;

All of these objects animate properly as of the latest FusionFix versions, fixing any mission where these could have been noticed too.

Shader issues

• Rain streaks become shorter at frame rates past 30;
• Motion blur becomes weaker at frame rates past 30;

Feel free to report more issues below, but not already known ones.
Thanks to Gillian for finding some issues and providing footage for them.