Sobald ihr euch bei Steam einloggt, wird automatisch der Patch 1.21 für Supreme Commander 2 (ab 13,50€ bei kaufen) runtergeladen. Folgende Veränderungen bzw. Verbesserungen nimmt das Update vor:

New Features:
-Build mode can now be accessed while holding shift.
-Added Safe and SafeMode command line options as a better alternative to resetting monitor resolution - Using one of these options will start the game at 1024x768@60hz in fullscreen and allow the player to change his options to something else after the game loads.
-Added build mode hotkey for Cybran Mass Convertor. Removed Ctrl-M key mapping for old Cybran mass convert ability, which no longer exists and was causing a crash.
-By popular request, reset Season 2 ELO ratings.
-Quitting a game will stop the replay from recording immediately.

Fixes:
-Fix for targeting units under the influence of world forces (ie Magnetron).
-Fix for units becoming unrepairable.
-Partial fix for selected groups of units not all Teleporting or Jump Jetting when given the order.
-Fix for Space Temple cooldown being activated even if the beacon was not placed.
-Better handling for units getting stuck in a position when they try to reclaim something directly underneath them.
-Fix for ACU/engineers going on a walkabout when trying to build something that overlaps with their current position.
-Fix for some factories and engineers getting XP for killing things when they should not.
-Fix for units colliding with terrain when boarding a carrier.
-Fix for not adjusting a units health when it recieves a MaxHealth buff on non-DLC side.
-You can no longer use the Magnet Pull, Magnet Push, or Pullinsmash ability while No Rush is active.

AI:
-Fixed up AI platoon templates.
-Fix for AI platoon sizes.
-Fix for AI platoons "dancing around".
-The AI influence map decay rate for mobile units has been lowered.
-Fix for AI building too many Mass Fabricators.
-Adjusted how much mass a Mass Convertor adds to the AI's Resource Manager.
-AI will only build 1 ProtoBrain.
-AI will attack ACUs more in Assassination mode.

Known Issues/Under Investigation:
-Pre-1.21 Replays will not function with 1.21.
-Teleporting/Jumpjetting group fix only partially implemented.
-Memory Management and allocation optimizations.
-Desynch related to VTOL aircraft.