Inspired by the 100 Lines community project released last month, pcorf has released Zone 300, a new vanilla compatible Doom 2 megawad where 31 of the maps are limited to a maximum of 300 lines. The maps have excellent gameplay with their difficulty being about on par with the official Doom 2 maps. If you're worried about visuals, pcorf does more with 300 lines than you probably thought possible. There's a brand new soundtrack, too. Grab a copy from the Doomworld Forums thread and give it a go.