I'd guess the 'realistic' scenario helped. I know a lot of folks who wouldn't touch a game with a fantasy setting ("it's for children"), but are ok with a game

I'd guess the 'realistic' scenario helped. I know a lot of folks who wouldn't touch a game with a fantasy setting ("it's for children"), but are ok with a game with a setting based in reality. Also, simplification works - maybe the varied enemies make the game too difficult for some players.