This is a turn-based boss battle game.
Astro Trio is a chrome app game where a player controls a team of three characters who throw projectiles at a moving enemy. The moving enemy fires back projectiles at the three characters. The player can change the position of the three characters to move the person in front behind, so the character who was in front will not be getting hit by projectiles. The player can have the characters use items and energy abilities to restore their simulated hit points from taking simulated damage.
Players can adjust the enemy’s simulated hit points to either lower or raise them, making the time it takes to defeat the enemy shorter or longer, respectively.
If any of the characters has their simulated hit points go to zero, the simulation ends, and the player loses the game. If the enemy’s simulated hit points go to zero, the simulation ends, and the player wins. Either way, when the simulation ends, the end game time is displayed. Players can try to win the game in a shorter amount of time.