The first three difficulty levels can be played with pretty much any style, offensive, defensive, balanced.
I kinda struggled on the Hardest difficulty on which I adopted a defensive/building playstyle and I won the campaign much more easily. Makes sense, since your opponent usually has better initial stats than you, giving him an edge and making it difficult to handle both defence and attack.
I'm sorry I cannot get into it. For starters, the chapters seem to be disjointed with one another. I'd MUCH more prefer it if it were made in such a way so as to make the ending of a chapter more seamless with the start of the next. "What did happen after I met those hooded figures? Forget that, we start from here now"
Apart from that, this seems like a filler, much less interesting than the first one. It feels as if the quality of the writing is going downhill.
I am skipping ahead to 2094 when the game is not loaded (close it, change the day forward, load the game, change back to 2014) and have reached about 10 quadrillion angels after quite a few restarts.
The amount of grind predicted is immense.
OK, so... I have enough money to buy the universe, enough destructive power to obliterate it and enough launching power to send missiles to the other side of the universe.
Not bad for a day's non-work!
I spent all my upgrades to XP bonuses, then evenly to attack, agility and defence & speed (to a lower extent). After a point I could grab a few army making buildings then shock attack and pretty much crush every other faction in the map within seconds.
This game would be a typical puzzle game with 1, perhaps 2 interesting twists, if it weren't for all the Portal elements, which in turn suck because there's been quite too many "evil robot mastermind" games that "run tests" on "human test subjects".
Remove the portal aesthetics and you could have something original. 2/5 (I disliked the animation, controls and the music).