Moderator's note: merged from independent topic, I hope that is ok 
I've been playing the flare game.  It had been years since I last played it and it now has a complete campaign.  I"m actually amazed at how long it is.  I compiled from the latest source and didn't have any issues with that.  Some of the mods messed up the menu, I'm not sure why, so I removed them.
I was looking on youtube and saw all these mods for like diablo1, and I'm like, why.  All I remember about diablo 1 was the copy-protection on the cd made grinding noises and wore out the drive.  You still need the old diablo1 cd to play the mods. I like flare because there is no DRM copy protection, runs under GNU/Linux, and yeah, that is good.