Like Ducktales, a beta version of Darkwing Duck was released on the internet.
Much of the game is the same, save for a few minor differences later on in
the game. The Moliarity boss fight starts off with all three flamethrowers
active, unlike the final where one is broken. Moliarty only hurls hammers while he's fixing the flamethrowers in the beta, whereas he only chucks them
when all the flamethrowers are active in the final. Megavolt, the boss of the warf level, is twice as fast in the beta, and he also doesn't fire a ball of lightning on the floor as he does in the final. Several graphical changes were made as well. The backgrounds for the bonus stages were changed between versions, and F.O.W.L. was fingered as the thieves in the first bonus stage in the beta.  The hawks in the forest stage were previously owls in the beta. The lights on Steelbeak's canopy were not present in the beta version, either.. The platforms in the warf level had spikes on them in the beta, and you could also hang on them. They were changed to slabs of stone in the final. Strangely, Darkwing's gas gun bullets were changed in the final to appear more like fireballs than gas clouds.