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What is with all of these crazy rules?
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One Must Fall 2097 is unfortunately both an extremely customizeable game and an extremely CPU dependant game.

Not only does it allow the player to set several options which affect the speed at which the game plays, but it's programming is also too primitave to regulate its own in-built timing. This means that, even on the default settings, the game runs absurdly fast at rates that do not represent what would have been the appropriate speeds when the game was created.

To rectify this problem we have decided that several of both DosBox settings and in-game settings must be set to exact and identical values to ensure that all speedrunners are playing on an equal ground that represents the intended play speed of the game on the actual hardware of its time.

One Must Fall 2097 is a unique case of being made on a platform that has dynamic hardware but just before programming practices that equalize hardware speeds became standard. All of those convoluted rules are unfortunately necessary.

If you have any further questions or suggestions about the agreed upon settings for the speedrun, please let us know. We are all ears.

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How do I access the Advanced Options?
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There are 2 ways to access the advanced options:

You can do either:
- Hold the keys 2+0+9+7 at the main menu
or
- Run the game by executing from the dos prompt:
FILE0001.exe ADVANCED

After you do either of these things, a new "Advanced Options" setting will appear after selecting the Gameplay Settings from the Main Menu.

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How do I access the Deadly Difficulty?
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Set the difficulty to Champion and press right 22 times while the Champion Difficulty is highlighted.

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How do I access the Ultimate Difficulty?
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Set the difficulty to Deadly (using the above process) then press and hold the keys O+M+F and press right while the Deadly Difficulty is highlighted.

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Who are Fire and Ice? and how do I fight them?
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Fire and Ice are two secret opponents which can be faced in One Player Mode. You can face Fire and Ice by performing the following process during a One Player Mode run:

1) Set the difficulty to Ultimate.
2) Defeat your opponent in the Fire Pit arena.
3) Perform a destruction on your defeated opponent.
4) Right after the destruction, do the Fire & Ice move.
5) After doing the Fire & Ice move you will fight Fire
6) Defeat Fire and perform the Destruction/Fire & Ice move again
5) After doing the Fire & Ice move to Fire you will fight Ice

You can find a more in depth guide which also contains each characters Destruction/ Fire & Ice moves here:
https://gamefaqs.gamespot.com/pc/918490-one-must-fall-2097/faqs/12152
(Credit to Robyrt for the Guide and GameFaqs for hosting it)