Eagle Ordinary
A webcomic set in the Warhammer 40,000 universe, Eagle Ordinary is based on an apparently madness-filled Only War campaign the creators once played, and chronicles the misadventures of a ragtag squad of guardsmen and their squeamish (junior) commissar as they battle Tau, heretical tech-priests, and the nefarious plans of a Rogue Trader. It's arguably one of the highest quality 40k webcomics out there, enough to have even caught GW's attention (in a good way, for once), as they had the comic's artist do several bits of work for their community websites.