– Ace Mode: Play challenges spanning all of the Gundam series

– Story Mode: One big, new adventure from start to finish

– Survival Mode: Test your endurance against a never-ending onslaught of enemies. Co-op via split screen

– Versus Mode: Take on a friend in battle (no word on online)

– Combination Mode: Build the ultimate machine to pilot

– Gallery Mode: A collection of illustrations from various Gundam works throughout the years

Link