Set during the conflict in the original Red Alert 3, Southern Rising will introduce two new factions, the Forth and the SLIM, which are also intended on global domination and freedom.
Although it may look to be nothing more but another usual anti-infantry vehicle, players will often be tempted and will feel the need to have a good bunch of those lying around, either hunting infantry or ships. It also comes at a good cost, so there's no problem spending on them, you won't lose much investiment. As descripted, it's secondary mode is to submerge into water and launch a bit more torpedoes than the Riptide ACV, which will be a more useful firepower than just the twin autocannons from the primary mode, made for anti-infantry. However, it won't be much against the large-sized ships the Dreadnoughts and Shogun Battleships are, and it'll be very vulnerable against air strikes and other faction's subs, specially the Allied Submarine Hunter.