Rescue has been around since the very first instalment of R2D.
Basically, you just have to wait for a rescue vehicle to come for varying lengths of time. After it arrives, you wait for another timer to tick down before it whisks you away to safety.
While the whole thing depends on your survival, how long you have to survive depends on the map itself. The time you have to wait for help to arrive has mostly been increased in v0.9.3.
When it does, it will land in a pre-determined spot. On 1930's Kingstreet, it has the possibility of landing on two spots on the map. It is the only map for the Helicopter to have multiple spots to land on.
After landing, it will wait until all remaining survivors board or after 1 minutes has passed. Whichever one happens first, it will leave.
A similar thing happens with the Bus, except it turns up by road, rather than the skies.
- It's recommended to stay close to the Helicopter landing spot.
- This generally makes for an easier escape.
- A Digger can fling you away from the landing zone. Pay attention.
- This was part of Original Survival. For clarity, it has been split.