Use a generous challenge window
Set a 24- or 48-hour window and write the timezone beside the deadline. Choose one game and a small attempt limit so nobody has to stay online waiting for another person. Coin Drop is a simple score example: each friend takes the same number of runs and reports the total displayed points before the window closes.
Make the turn recognizable
Send the title link, the exact rule and an invitation to reply with the result. Ask each person to say when their turn is complete so the group can distinguish a finished attempt from an unanswered message. If someone misses the window, decide whether to extend before looking at results, not after seeing who is ahead.
Keep a routine without pressure
A weekly round can work better than a daily streak when time zones and schedules differ. Let the current winner select from a short list of games, or rotate the choice each week. Keep participation optional and avoid making late replies a penalty. The goal is a shared activity that fits real life, not a requirement to be online at the same moment.
Questions about games with friends long distance
Can we play live across countries?
Oneshotgems does not host live multiplayer rooms. For simultaneous play, use an external service that offers the exact friend-play mode you want; for flexible timing, run an asynchronous score challenge.
How do we handle different time zones?
Write a deadline with its timezone and give a wide enough window for everyone. Set the rule before starting and decide in advance whether a late turn extends the round.