Read the room. Pick your number. Cash the crowd — or go solo.
2–8 players. Everyone acts at the same time — no long waits for turns.
Score the most points after 8, 12, or 16 rounds (host chooses). Highest total wins. Ties share the crown.
Echo (the namesake)
If you match other players: score +2 for each partner on your number (pair = 2 pts each, trio = 4 each, …). If you are alone: score your number’s face value.
Harmony
Only the largest matching group scores — each member gets group size × 2. Everyone else scores 0. If everyone is alone, you each score your face value (consolation).
Solo
Unique numbers score their face value. Anyone who matched someone else scores 0.
Host sets pick time (default 10 seconds). When time runs out, unlocked players get a random number so the round never stalls. Reveal lasts a few seconds, then the next mode begins.