Post-it notes war between Ubisoft and BNP

Ubisoft and BNP (French bank) have began a post-it notes battle featuring videogames characters. For fun, employees of Ubisoft's studio in Montreuil reproduced Space Invaders with post-it notes on their windows. Nothing very original, but things quickly changed when employees of the BNP in the building opposite responded by reproducing the canon of Space Invaders.