After playing a round of Wave in each map, we've found a few little things.

General:
- After wave 10, it goes to wave 11 and the zombie count goes up to 10000 and nothing else spawns.
- One time, wave 10 started immediately after wave 9 finished without Whitaker opening the store.
- If the players manage to get in the saferoom, it'll move on to the next map in the campaign. In the next map, wave 1 spawns and then Whitaker says that the shop is open but then nothing else happens. The store timer stops at 00:00. Going through the campaign is possible with only one wave spawning each map.
- It'd be nice to have a lot more time in the beginning after all the players load into the map. About a minute or even thirty seconds would be more forgiving than only five seconds.

Apartments:
- If all players crouch in the saferoom doorway, the door can be fully closed and it'll transition to the next map. The bots will just teleport into the saferoom if everyone is inside with the door open.

Milltown:
- Whitaker doesn't kick the players out of the shop when the next wave starts, allowing a very safe area to fight from.
- The cola doesn't spawn anywhere after it's been cashed in even if the round was started over from a lobby. (Unless it's supposed to be rare and has different spawn points?)

Return to Town:
- The saferoom close to the playground is completely unblocked and lets the players transition to the finale map.
- Whitaker doesn't kick the players out of the store in this map either.
- The infected tend to spawn on the other side of the map which makes waves take much longer.

Hope this helps!