I wish I could have played with others, I think it would have been very enjoyable that way!
That first turret above the stairs scared the crap out of me. I was not expecting non-wave enemies behind unlock areas :D
I loved the variety of guns. That MAW was a beast.
I couldn't figure out what the Infiltrator's arc ability really did.
I wish I had an indicator of whether I had an arc charge or not. Sometimes I couldn't pick them up after making them, but I was pretty sure I didn't already have a charge.
As the engineer, I was able to place 2 turrets, then I couldn't pick up another arc charge. I wasn't sure if this was the above issue, or if there was a 2 turret limit.
The environment turrets take awhile to disappear after you kill them, leading me to often put in more ammo than I needed to.
Before you unlock other guns, that first wave of robots is rough.
The operator wall was great on flat ground, but much less so when I used it near the stairs.
After the initial selection of class, there wasn't a description of them after that. I had to delete my save just to see what the description was for the infiltrator.
I got to a wall that said "use an arc charge", but I didn't seem to be able to activate it.
I loved that the zombies got stronger. First one hit, then 2, then 3, etc. I do wish there was a visual distinction for this.
There was a green/yellow bar bellow your gun's ammo, I don't know what that was trying to tell me. At first I thought it might be arc related, but that didn't appear to be the case.
Being able to start with the AR rifle was clutch.
Overall, the experience was pretty slick. I wish I could have explored more. I desperately want to know the lore!