A multimodal surgical gas delivery system (200; 300) configured to couple to one or two surgical access devices (231, 233) providing access into a patient body cavity, the system comprising: a computer-controlled control unit (210; 310) having a fluid pump and including a software algorithm, program or code residing on computer useable medium having control logic for enabling execution on the surgical system (200; 300) using a computer processor; a supply conduit, a return conduit, an insufflation subunit with one or two insufflation conduits (118; 318a, 318b), and a diverting valve (295; 395) connected to two conduits (251, 253), each comprising filters arranged in the two conduits (251, 253), wherein the two conduits (251, 253) are adapted for respectively connecting to a surgical device of the one or two surgical access devices (231, 233), the diverting valve having a plurality of defined operating positions and connected to each of the supply conduit, the return conduit and the insufflation conduit (118; 318a, 318b) for providing multiple user-selectable operating modes of the surgical gas delivery system based upon a user selected operating mode, and wherein the control unit (210; 310) has multiple user selectable operating modes including: a recirculation mode wherein the diverting valve (295; 395) is positioned to facilitate the delivery of pressurized gas from the pump, through the supply conduit, to a surgical device of the one or two surgical access devices (231, 233), to create and maintain a pressure barrier therein to inhibit losses of insufflation gas from the patient's body cavity accessed by the surgical access device, wherein the return conduit is configured to return the insufflation gas to the pump; a smoke evacuation mode wherein the diverting valve (295; 395) is positioned to facilitate the removal of smoke from the insufflation gas in the filter and within patient's body cavity to improve visibility within the patient's body cavity; an insufflation mode wherein the diverting valve (295; 395) is positioned to facilitate the delivery of insufflation gas into the patient's body cavity from the insufflation subunit, through the insufflation conduit (118; 318a, 318b), to create and maintain a pneumoperitoneum; wherein the computer-controlled control unit (210; 310) is configured and adapted to permit a user to select an operating mode for the multimodal surgical gas delivery system alone or combined with another operating mode. a recirculation mode wherein the diverting valve (295; 395) is positioned to facilitate the delivery of pressurized gas from the pump, through the supply conduit, to a surgical device of the one or two surgical access devices (231, 233), to create and maintain a pressure barrier therein to inhibit losses of insufflation gas from the patient's body cavity accessed by the surgical access device, wherein the return conduit is configured to return the insufflation gas to the pump; a smoke evacuation mode wherein the diverting valve (295; 395) is positioned to facilitate the removal of smoke from the insufflation gas in the filter and within patient's body cavity to improve visibility within the patient's body cavity; an insufflation mode wherein the diverting valve (295; 395) is positioned to facilitate the delivery of insufflation gas into the patient's body cavity from the insufflation subunit, through the insufflation conduit (118; 318a, 318b), to create and maintain a pneumoperitoneum;