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Have you done a Speedrun before? It took me 2 Hours to beat Mega Man 11. I could add the Double Gear System to a Legends of the Hidden Temple OOC Game.

The Double Gear System greatly increases Speed and Power of Machines in Mega Man 11 but was considered too dangerous to continue since Dr. Wily was going to use it as a Robotic Weapon should it be completed, so it was shut down by the Robot University because they feared it in the opening cutscene before the Title Screen

I beat Devil May Cry 1 HD with No Continues/Yellow Orbs on Normal Mode some time ago.

There's various Walkthrough & Playthrough Challenge Types
No Continues = Bans the use of Items that allows a player to continue should the player lose the game. (In Persona, the player would NOT use a Dusk Plume as they allow the player to continue fighting should the leader be killed by enemies)

Any Percentage = Anything Goes
Completion = All Main & Optional Goals

Just to name a few as there's some other types of Challenges for Games
Warpless = Bans the use of Warp Zones to Skip entire Levels
True Story = Main Storyline including the Last Story
and more.

In Spy Fox 1's Key Wallet Path, there's an easy to get it as there's a Laser Safe Puzzle, the hint you're given is that the Red Laser goes to the Red Circuit while the Blue Laser goes to the Blue Circuit.

The Fastest way to do it is to use as few mirrors as possible to away from the Key Wallet so that it reaches the Top Left Red Socket with the Red Laser while the Blue Laser reaches the Bottom Left Blue Socket.

This would be called an Underpar Mirror Challenge when Speedrunning Spy Fox if the Key Wallet Path is used.
Underpar Puzzles = Solving a Puzzle (Inventory Adventure, etc) in few steps as possible.

Its an Adventure Game.
There's also other Challenges for Speedruns or playthroughs

For Ace Attorney & LA Norie, some challenges would be called...
Sherlock Lives = You can't give a wrong answer that costs Health or lowers your Rank. This is Really Tricky as you need REALLY Pay Attention in the Game and think about your answer as you look through the dossiers & items in the Ace Attorney Games BEFORE giving your answer.

Eagle Eye = Examine all Surroundings for Clues & Leads without missing anything important

Flawless = No Mistake Run. Which means you must complete a story with the Highest Rank Possible without making a mistake in the game that cost health or will effect your Rank. In early CSI Games, you can't ask for help as it will lower your score. This subchallenge would be called Hintless.

In early CSI Games, you can't ask for help as it will lower your score. This challenge would be called Hintless Run. A Hintless Run being a Challenge you need to solve the Puzzle without using any hints.

Heard of Midnight Club? Its a Racing Game similar to Need for Speed