Just want to make people aware of this excellent little game. The mechanics are so similar to ICRPG, it takes about 2 minutes to convert the setting to it. If you like space opera, gritty & dirty with a main theme of ‘survival’, check out the book or PDF - the included tables to roll on are worth the money alone. You could potentially convert ‘Alien’ with the help of this, but I think it works best to use DiS in conjunction with XdZ for a gritty and dark survival horror game.