User blog comment:BlizzardOfOz123/Electro-Bolt/@comment-3412492-20110504211927/@comment-3579040-20110505190048

It's not that the enemies are much tougher, it's that they come in much greater numbers, and they are much smarter. Like in the second game, you would only have five, maybe seven thuggish splicers at a time, all running stupidly to their death. In Bioshock: Survival (My now official name for my sequel) you can have up to twenty or so Thuggish splicers, with a couple of Leadheads to boot!