Tools
DogThing

Multi-functional trainer for PC version. (external link)

By PorkySM

Media:
Localize Inputs

Restricts inputs to the game window (PC) (direct download)

By PorkySM

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Microsoft DirectX Control Panel

May help to reduce loading time on PC version. (Run as admin and uncheck 'Use hardware acceleration" in DirectDraw tab). (external link)

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Saves
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Splits
Blank Splits

Suitable for all categories, except for Any%. (external link)

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LiveSplit Auto Splitter (PC version only)

Setup: Edit Layout - '+ button' - Control - Scriptable Auto splitter - Double click on Scriptable Auto splitter in the list - Browse - Select 'Dog.asl' - Ok; (external link)

By PorkySM

Media:
Patches
None yet