GAME is another potential alternative process for the production of oil with high yields which do not use organic solvents. In this process, CO2 is dissolved in the oil contained in the seeds before pressing the seeds [93]. It was found that at the same effective mechanical pressure (absolute mechanical pressure minus the actual CO2- pressure), the liquid content was the same in both conventional and GAME press cakes. The liquid in the GAME press cake was saturated with CO2 (typically 20-50 wt.%), reducing the oil content compared to the conventional cake by the same amount. The contribution of this effect increased with increasing solubility of the CO2 in the oil. Furthermore, the dissolved CO2 reduced the viscosity of oil by about an order of magnitude [93], which could increase oil extraction. Some addi­tional oil was removed by entrainment in the gas flow during depressurization of the cake.

GAME has some advantages compared with conventional pressing. The first advantage of GAME is the increased yield at lower mechanical pressure. Compared with supercritical extraction, the amount of CO2 that has to be recycled is reduced by two orders of magnitude from typically 1 kg of CO2/kg of seeds [93] to 100 kg of CO2/kg of seeds [69]. Therefore, the energy and equipment cost for the solvent recycle can be reduced. Compared with SCE, the second advantage of GAME is CO2-pressure required is low, which is approximately 10 MPa. In contrast, for SCE extraction, pressures of 40-70 MPa are not unusual ([69]; Rosa et al. 2005). These two effects provide a significant reduction in the energy requirements for recycling and repressurising the CO2. Additionally, some reports in literature suggest that the use of CO2 at 7-20 MPa has a sterilizing effect on the substrates [80, 94]; this may be a beneficial side-effect of the GAME process.

The general applicability of the GAME process to enhance the oil recovery from oilseeds was shown by pressing experiments for sesame, linseed, rapeseed, Jatropha, and palm kernel by Willems et al. [95]. It was proved that GAME was capable of reaching yields that were up to 30 wt.% higher than conventional expression under the same conditions. Despite the lower yields for hulled seeds in conventional expression, GAME yields for hulled and dehulled seeds were very similar. The oil yields obtained for GAME increased with increasing effective mechanical pressure; the yields were the highest at a temperature of 100°C. These effects were similar to conventional expression. With CO2-pressure up to 10 MPa, the oil yield increased significantly. However, increasing the CO2-pressure above 10 MPa did not significantly increase the oil yield.