Universe A1 takes place in different universes, each having their own landscapes and locations. Each set is based on its own universe. This game is a one versus one deck building trading card game, where your goal is to have your opponent's graveyard reach five characters. You can achieve this by having your characters attack and defeat your opponent's characters. Other card classes, like items, boosts, and gears, may assist you as well. Defeating an opposing character doesn't just help with your end goal either, there is a mechanic that allows you to play a boost card for defeating an opposing character. This boost may be used every turn until the game is over without discarding it.
Universe A1 also hosts a variety of deck building strategies and synergies. Some examples include matching attribute decks, location decks, tempo decks, cheap decks, and sweep decks.
Like other card games, this game has a "resource" that must be managed in order to play cards, use attacks, abilities, etc. This resource is referred to as "action points". Action points are given each turn from characters you have in play. Other items and boosts may assist in giving action points as well, but the primary way is from your in play characters.
—description from the designer