ok
so in that case as some props you could add futuristic barriers, command tables. and for terrain you could make a mixture of lab floor and concrete. lab on inside, concrete on outside.
btw after you escape you find a bunker to hide in and you have to break a wall and a command table to access a hidden part of the bunker that is infected,then you have to turn off the alarm and destroy some cabinets,after that you find and break a tool box,then you can use a 3d-printer to make a barrier dissolver,then you take a space ship and it crashes after hitting a meteor,and that is all i have for now
you could use a prop with damage active, so you have to find a weapon and destroy the prop, as for the bunker, you can eaily use a button and a teleporter.