Space Quest 1 EGA - Alternate Ending
It's not really a death, but... if you don't take the cartridge back out of the reader on Kerona, and you finish the game without it, you get a slightly different ending.
Congratulations Roger Wilco, you've rid the universe of the evil Sariens and saved your people from certain doom. You're an all-around hero! You've made it home safely aboard the stolen Sarien craft, where you've encountered a cheering Xenon crowd. They have gathered together for a ceremony in your honor. The ceremony is already in progress.
(The rest is the same as the usual ending.)