
I recently finished up Mass Effect.  This Bioware game was originally 
developed for the console and later ported to the PC.  While this is 
clearly evident in some places, they did make a strong effort to do a 
proper port.  I've heard they did a lot of revision to the inventory 
system, which I can't comment too much on since I haven't seen the 
original.
 
The gameplay is singularly driven by a forceful main story.  There are 
quite a few optional side missions available, though these suffer from 
being A) a tad repetitive after a while and B) entirely disconnected from 
the plot, so you need to make an effort to ignore the constant pressure of 
your primary goal in order to do them.
 
Combat is typically fast and frantic.  You can pause to give orders to 
your squadmates, though for some reason there is a quite noticeable pause 
when hitting the spacebar to bring up the orders menu; long enough for the 
situation to change in certain instances.  Squad members are generally 
useful, as their combat skills are decent and most will have effective 
powers that your character does not.  I found the game's cover system to 
usually work really well.  This is a model you don't see too often in PC 
games, except for console ports.  Running up and pressing against a solid 
object (wall or battlefield obstacle) will put your back up against it.  
Strafing sideways to the edge of the wall will let you peek around it and 
when you fire or sight, your character will peer from around cover.
 
The main story is fleshed out effectively.  Characters all have their 
motivations, no matter how misguided they may be.  The one question never 
answered is the big "Why?", but the characters recognize this and at least 
bother to pose the question.  I had a lot of fun with the dialog options.  
There's a system of player "paths" in place.  Act like an angel (save 
innocents, be nice, pet kittens) and you receive Paragon points, which 
open up certain options.  Performing your job ruthlessly, responding 
brusquely, ignoring orders, and demanding payment will earn you Renegade 
points.  I played a female Renegade and really enjoyed what a bad ass she 
was.  (Voice acting was also really good.)  The drawback to the main story 
is that it felt so short.  If you neglect the side missions, the game will 
go by pretty quickly it seems.
 
The inventory system, apparently the source of several complaints on the 
console version as well, definitely could use some improvement.  There's a 
hard limit of 150 items, and with all the weapons, mods, and ammo types 
you come across, it's easy to hit this limit.  The problem when that 
happens is that you're forced to scrap the new stuff and not given the 
option to do so with the older items (scrapping an item turns it into 
"Omnigel", generally useful only for opening locked containers).  There's 
an overwhelming quantity of mods and ammo and weapons and the problem here 
is that the upgrade process is just uninteresting.  I'm a gun guy; I 
drooled over the options available in the 1.13 fan patch for Jagged 
Alliance 2.  Even with all the varieties of weapons you come across in 
Mass Effect, they're all just 3 stats.  They don't even look any 
different, aside from color (you can't even see the items in the inventory 
screen itself).  Worst of all, there's hardly any give and take with the 
weapons.  Some seem just better than everything else you've found.  So it 
hardly ever felt like a matter of prioritizing certain stats over others.  
Equipment modifications are a little better in that respect.  They're more 
interesting, clearly useful, and force you to choose.  There's so many 
though and spread across so many levels (some mod types change names while 
keeping the same effect at different levels, a real puzzler).
 
Overall a really good experience.  There's clearly been a lot of serious 
thought put into the game (vastly fleshed out backstory and history are 
available for reading, though optional).  I wish every game was this well 
constructed.