You can use your custom font in Slider Revolution Magento Extension in the following way:
1. Upload your font to your server, for example in media/fonts/ folder.
2. Include your custom font by inserting following line to style of your slider. You can do it in sliders Custom CSS of Slider Settings here:
Or in Edit Global Styles dialog when you editing Slide:
3. Now you can assign this font to text layer element by inline style when editing layer:
Or use this font in Edit Style form to add it to caption style:
Alternatively you can choose font from list of 500+ Google Fonts.