Ah, damn, that's a bother :( Although, my gf has the same issue and played it without being sick, somehow..? Perhaps you could give it a careful shot ! If not, then go play OneShot or Inscription ^_^
huh? its not, yes you walk in the game but you need to plan your routes and everything, basically the gameplay is something like snowrunner but instead of driving trucks youre walking and also you gotta engage on combat and stuff