In the process of creating MSFonts, I determined that Windows 95 used a very simple method for creating boldface variants of bitmap fonts: it logically widens glyphs by one pixel and double-strikes each glyph with a 1-pixel offset. MSFonts includes pre-baked bold variants for every font that makes sense, but it isn't too hard to do this yourself for any font that exists in a deck.
You can paste the following function in the Listener:
on embolden old new do f:deck.fonts[old] n:deck.add[f new] n.size:f.size+1,0 each i in range 96 g:f[i] g.size:g.size+1,0 n[i]:g.paste[g 1,0 1] end end
And then use it like so:
embolden["deckbuilder" "deckbuilder_bold"]
A variety of variations on this technique are possible to create different "mechanically compressed" fonts.