Chris is the main male character in Resident Evil and also the harder option of the two main characters in the game. Personality wise, he does seem to come across as being quite dense at various times during the game, like he wouldn’t know what was happening, but I'd have to say that he is quite the opposite, much smarter that he looks. Chris has a very protective role over people, especially females, such as Jill and his sister Claire, though there isn't much of a given chance to show this in Resident Evil. Chris is also a smoker, but due to censorship the opening video scenes were removed from the US and European versions. You can find the uncensored opening online if you look around.
Because Resident Evil has a lot less character development than a lot of titles out there, so finding a real focus on characters can be a problem, for example we never find out why Chris was kicked out of the Air Force for, and can only speculate from other reports. Chances are, from the details of Jill's Diary in Resident Evil 3, Chris has a anger problem and this could have resulted in him leaving the air force.
Chris has a general assortment of weapons during Resident Evil, from a combat knife, you can also get a Beretta Handgun, Shotgun, Magnum, Flame Thrower and Rocket Launcher. Details on each of the weapons can be found in the Resident Evil weapons section.
Chris holds less items than Jill (6 instead of Jill's 8) and this makes the game harder. He also has to pick up one more key instead of using a Lockpick. Chris also has a partner with Rebecca, if that's good or bad is your call, but she is useful for giving you healing items when you need them. At one or two stages you may be required to play as Rebecca to do various tasks (getting serum or mixing chemicals).
Chris has returned in two later games, Resident Evil 2 Dual Shock Version (Where he is a character in the Extreme Battle Mini-Game) and Resident Evil Code Veronica as one of the main characters of that. He has also been mentioned somewhere in every game so far apart from Survivor.
Also returning is Chris Redfield, Claire's brother. With no real clues given to us as to what he's been up to since leaving the other S.T.A.R.S. members in late August (his Epilogue file in RE3 said little-as did Jill's about Chris' hideout), he finds himself on a mysterious island after being given the info by Leon, who Claire contacted from Rockfort Island.
Chris is how most remember him. A strong character with attitude. Various skills he has come in common quite easily and you'll find he's a great change of character to play as for a while, and is for most the better highlight and part of the game of Code Veronica.
Chris seems to uncover a lot of secrets going on within the game, this probably has to do with him arriving late on the scene. The only problem is not everyone there is all that inviting, and that isn't including the zombies and other monsters around.
The additional scenes included for the Code Veronica re-release are often looked upon more for their inclusion of Wesker's goals and background, but the scenes also do build upon the background of Chris and Wesker together in S.T.A.R.S. and the events from Resident Evil 1.