Finished all the Campaign tophies (except hard & normal trophies - I played the last chapter on "hard" setting, but it didn't unlock the hard trophy, so looks like it didn't have the same glitch as WFC... teaches me to try cheating)
Hard setting is just about right, as it was suitably frustrating for a couple sections, but with persistence, it was possible to work out a strategy to get past it.
So I a quick try of Escalation before taking a little break... and damn, it's a lot harder than WFC... and with FOC you have to reach wave 15 4 times to get the 4 trophies (WFC was just once).
I tried it out as a single player (which it allows for), but doesn't look like one would get far, like it was easy to in WFC. Wave 3 was as far as I could get, before I kept getting over-run by the tougher "shot gunners".
A lot less places to take cover, and a lot more attackers in the first wave than in WFC. I'm guessing that a strategy would require people grouping together to cover each others' backs.
Not sure where the "extra teamwork requirement" comes into this one, as unlocking things didn't seem any different to WFC.
I miss having two special abilities, especially cloaking (to give time to relocate and/or refresh). This version of Escalation will instead require people to learn to master the four different types of robot & abilities, as it was easy to select preferred abilities/modes in WFC.
I've already been reading people saying that they've completed all achievements already... and looking at the leaderboards on PS3 Multiplayer & Escalation, some people have already spent 2-4 DAYS (50+ hours) of play time online, after only about 10 (24 hour) days of it being released. That's a lot of time committed to a single element of a single game.