An inflatable airbag system can be configured to be mounted to a frontal region of a vehicle. The inflatable airbag system includes an airbag and an active control mechanism, and is configured to deploy in various configurations in response to frontal and oblique collision events. An active portion of the inflatable airbag deploys to an expanded configuration when a collision event is an oblique collision event and deploys to a less expanded configuration when the collision event is a frontal collision event. The active control mechanism can include one or more tethers or an inflatable member.