The emphasis is on the ODSTs being ordinary humans. Exceptional soldiers, but clearly not augmented like the SPARTAN II are. -VISIR night vision, contrast changes in outside daylight time to highlight FOF(Friend Or Foe) tags within 100m in-game. -Limited customization. Armor configuration can be unlocked, colour stripes and camouflage, decals and callsigns can be assigned. -Integrated party and communications suite to the HUD takes place of the audio logs. Xbox Live friends can work together and coordinate, while in single player this is handled through the fictional Battle Net and AI. Easter eggs and a similar backstory like Sadie's present. -Larger scale insertions. ODSTs must secure dropzones in one or more missions for troop transports, and then fight alongside them in an offensive of grand scale. -Clandestine missions, involving direct action, intelligence-denial, assassination, reconnaisance and rescue. Just my $0.02