I liked your other games very much but this has an issue with the save slot area. It gets affected with a dark shade in save area and despite selecting the local save, it doesnt continue.
Inverted is being in air upside down. It can be done for only a short span of time through. Do not flip just stay upside down in air and flip when ur about to fall down.
There r some tips thrown here it would be helpful for new players :)
1) To revive your companion- a) the first way is to get a good weapon and approach them and press G ( probably not working lol)
b) Do not leave the screen. Go save the game then save and out then start the game.
2)Do not give ur companions melee weapons try to swap weapons and give them guns otherwise they will run to horde of zombs thinking they r hulks and thors.
3) Pick lock cant be done without sound.