4e? I don't know. 4e is certainly a good match for a lot of tactical games like FFT or Disgaea, but there are some important differences (IMHO) with X-com.
First, and most important, is that 4e is explicitly designed to play the same way throughout. X-Com otoh has several transformative points where game play changes. Flying armour, Psi, Some weapons, with EW access to Gene mods and MECs.
Second the focus of the powers is very different. 4e has active, useful powers. The EU/EW/LW perks tend to be either passive or situational. There are some exceptions of course, like Run and Gun or Double Tap.
Third, while 4e is similar to EU/EW in some ways, I'm hoping to cast a broader net and allow the game to capture the earlier games as well. And 4e is a terrible, terrible match for those.
The earlier games have no perk or power systems. Your characters are just a list of stats who gain personally tranformative differences only by learning Psi. THe meat and bones of the combat lies in the gear.
Now, I really like the perk system of the new game, but I do think a little of the emphasis needs to shift back to the equipment. EU/EW has a frankly terribly inventory system which is put to shame by games 20 years older. Why can I not pick up my unconcious medics med-kit and use it to save her life? Engine limitations, no other reason.
Sorry, I hope this didn't come off as an anti-4e rant. I actually enjoy playing 4e, it just feels a poor fit to me.
I haven't seen the new Gamma World. I'll try and take a peek at it sometime.
