The High Alert set includes four different Star Realms High Alert expansion packs, each with 12 cards.

• Heroes contains new multi-faction hero cards.
• Invasion features new ships and bases with Double Ally abilites.
• Requisition contains new ships and bases which cost less to acquire for each card of their faction you have in play.
• Tech features the new Tech card type, which grants you special abilities that you may activate on each of your turns.