Mass Effect

You may know that Bioware made a fantastic game called Knights of the Old Republic, and the only reason you could've disliked that game is because you absolutely loathe the Star Wars universe. 
  
Multiple endings based on your altruistic/complete dickhole ratings that persuaded you to play the game at least twice to see just how different situations can turn out.  You also had parties where you could have two team mates to roam around with you, like every other single Bioware game ever made in existence (okay, maybe just on consoles). 
 
And that's about where the similarities end between the two. 
 
This is Star Wars meets Star Trek. There's the plot that gets you emotionally involved, like the original Star Wars trilogy, and there's also an incredibly rich codex that explains all things scientific and organic within the game. There's even a neat sidebar next to planets that tell you everything you could possibly want to know about it. There's just such an attention to detail to everything, it's so easy to get lost in the world of Mass Effect. 
 
I haven't even begun to write what this game is actually about, but i'm not even going to because I am a Bioware fanboy. With that said, you're probably asking "Well, why not 5 stars?" 
 
 Mass Effect 2. That's why. I can't give that game 5.5 or 6 stars, and I need to show a clear difference between the two. This game's filled with graphical pop ups, long elevator rides that are too plentiful and too static to be considered immersive, and there's also the inventory system that was in dire need of an overhaul. 
 
Does that really demerit the .5? Yes. Only because of the sequel.