I don't know of any software that can convert PNG to TTF automatically. It would be much easier to do it the other way around, TTF to PNG. The only way I think it might be possible is to use a software specifically for creating fonts, like FontForge, & manually convert it. That might be a lot of work though. I've never created a font myself.

I use vector fonts in my games, too, and there's a better place to get them: the Open Font Library. It's a large and growing collection of uneven quality but considerable diversity, that helped several of my games look great. Most entries published there couldn't be brought over as we don't have an option for the specialized SIL Open Font License, but they're not game-centric like we are, either, so that makes sense. Hope this helps!

Those pixel fonts are generally used in 2d game engines which support pixel fonts. Even when they don't, it is not hard to implement.

You can use fontstruct to create your own pixel ttf fonts or find a premade one.

@claudeb: Would be nice if we could use SIL font license. I wonder if it's compatable, just no one has considered it yet?

Well, as I pointed out above, the SIL Open Font License is specialized, whereas all licenses allowed on Open Game Art can be applied to anything. It would complicate matters, and be less useful than the rest. But there are fonts under other licenses, that could be brought over. Only there's value in having multiple repositories of free culture, too.

If the SIL font license could only be applied to font submissions on OGA, I don't think it would complicate things.

What is the selling point of SIL?

I honestly am not that familiar with the license. I'm just a big fan of options. I should look over it. All I know is it is tailored specifically for fonts.

My favorite site (the best squirrel logo ever) and has a plethora of fonts, go get a nut!!

https://www.fontsquirrel.com

Thanks for the recommendation @AnthonyMyers. Bookmarked!