MTV's Multiplayer discovered a couple new features for this go-around in Liberty City. One very passive feature is GTA IV will have days of the week. So, instead of an endless cycle of night and day, there'll be an endless cycle of day and night split over seven infinitely repeating days. This will affect gameplay by only allowing Niko to access certain areas on specific days of the week. MTV says you don't have to worry about it turning into Animal Crossing though, the day/night cycle will be the same as other entries into the series -- meaning gamers won't need to mess with their system's internal clock.
The other reveal is the use of a slo-mo while driving. GTA veterans can already imagine the advantages and cool factor this could have while avoiding traffic or trying to hit a stunt point perfectly. A very nice feature, but one we'll have to see for ourselves to get a better feel for when and where it can be used. GTA IV is still expected to hijack the sales charts beginning April 29.