The next Tetris 99 event will be a crossover with Fire Emblem: Three Houses.
Play Tetris 99 and rack up points over next weekend – between 8am UK time 23rd August to 27th August – and you’ll unlock a Fire Emblem: Three Houses theme.
Points are picked up by winning games and ranking highly, though it shouldn’t take long even for casual players. It’s a similar event to the previous Splatoon 2 crossover which also awarded a theme.
Source: Eurogamer Tetris 99 gets a Fire Emblem: Three Houses crossover