Follow the below steps to play Arcade mode in PUBG Mobile:

1. Press the "Select Mode" button above the "Game Start" button.
2. Select "Arcade Mode".
3. Select your playing mode(War mode, Casual mode, Sniper match)
4. Select one or more modes and press 'confirm'.
5. Press the "Game Start" button.

Please note that some Arcade modes are only available at certain times. See below for details.

- Casual mode: Always available
- Sniper match: Opens every Mon/Wed/Fri/Sat and Sundays at 9 AM and ends at 9 AM on the following day.
- War mode: Opens every Tue/Thu/Sat and Sundays at 9 AM and ends at 9 AM on the following day.