Must-play game for all shooter fans. Great to see where the whole CoD franchise started off from.
Bad: sometimes hard to find out where compass is pointing to, check points are too far apart, game play is harder than normal (I played on regular difficulty and to me it seemed harder than normal), many levels get repetitive (e.g. clear a building, do something, and then fight your way back out of the building), no grenade indicator, squad AI sometimes lacks intelligence
Overall: If you are a CoD fan or fan of any FPS games, Call of Duty 1 is a must play, even if it is about 7 years old.
Online: I did not play online so I cannot comment on this.