Yes, why not. There could be a seperated game mode selectable from main menu called “Survival Mode”.
In this mode there could be more realistic values for what you may carry and you could have just a single life.
There could be a seperated statistic board for survival mode which additionally counts how long you survived and how much points you earned (for destroying machines) so that you’re able to compete and compare with other players.
Shouldn’t be too realistic and too hardcore. Just a new challenge which becomes available after finishing all main missions. Startpoint of each trial could be (selectable) a random savehouse or a fixed one (from the beginning).
Any further ideas for this survival mode?