I’ve been working on the first mod I intend to release on the internet! It’s called Portal Hell, and it’s pretty ridiculous. It’s a singleplayer Portal mod I’m releasing in episodes, each episode containing about 4 test chambers, all visually indistinguishable from the originals. Make no mistake, those test chambers will last much longer than the originals did. :) My mod is to Portal as this game is to Mario: