dragoner
KosmicRPG.com
One could use AC & HP in a game, because they are quick and sleazy mechanics that everyone groks; same as I would always keep polyhedral dice. I think though the difference is more along the lines of fantasy vs modern or sf, because the switch over is to guns, melee is minor. Modern and sf power levels can grow realistically huge, when one starts thinking about nuclear missiles or lasers that can destroy spacecraft.
Looking again at the 2e of Alternity, looks like it is dead, and istr what I found flipping through it at gencon was no spacecraft rules, and it was gun pornish, space murder hobo/dungeon crawl ... system perfect for bringing cinematic action scenes to life. Not terribly exciting. It seems a lot of sfrpg's goes for trying to be a low rent star wars, except there is already a star wars rpg out there. Star Drive and Dark Matter were pretty cool settings which I don't know that 2e is doing.
Looking again at the 2e of Alternity, looks like it is dead, and istr what I found flipping through it at gencon was no spacecraft rules, and it was gun pornish, space murder hobo/dungeon crawl ... system perfect for bringing cinematic action scenes to life. Not terribly exciting. It seems a lot of sfrpg's goes for trying to be a low rent star wars, except there is already a star wars rpg out there. Star Drive and Dark Matter were pretty cool settings which I don't know that 2e is doing.