Maybe it’s just me, but I didn’t find being swarmed out of the gate and dying halfway down the first corridor every attempt a whole lot of fun. I didn’t see a lot of difference in the mob count compared to multi player.
Oscar Mike by himself just couldn’t kill fast enough on normal mode. Slowest reload speed, ever.
Also, I’m not sure if there’s a planned run through of how things work that eases you into the game in the full version or not, but the lack of one here makes getting started not all that enjoyable for folks who want to get up to speed using single player.