Ubisoft All-Star Blast! offers multiplayer Bomberman-inspired play. The player selects a character from one of many popular Ubisoft games to act as their avatar in mazes made of wooden crates. They must use bombs to destroy the crates, collect hidden power-ups, and kill the character avatars of other online players. The game auto-selects random play modes. Typically, the player attempts to survive until time runs out or the play area shrinks down to a central tile.
The game starts by assigning a chibi version of a random character. After the player wins, they use golden bomb coins or watch advertisement videos to unlock and play other characters. Character options include Nomad from Tom Clancy's Ghost Recon Breakpoint, Rabbid Shark from Hungry Shark Evolution, Ezio Auditore de Firenze from Assassin's Creed: Brotherhood, Bud from Grow Home, Anton from Far Cry 6, and The Prince from Prince of Persia: Sands of Time.
The player directs their character to race down paths, open up new pathways using their bombs, and survive for as long as possible. They must keep the character away from the blast zones, as indicated by red tile highlighting just before a bomb explodes, and the edges of a shrinking maze. If the character dies, they can continue by watching a video.
Ubisoft All-Star Blast! gives the player coins and access to some characters as a daily reward. They can use the shop icon on the home screen to unlock and select new characters with coins in the upgrade area. They can collect additional boosters by watching videos. The game tracks the player's achievements on local and global leaderboards.
