Fright Train is the best Call of Duty Zombies alternative I've played in ages, despite starring a dog

Fright Train is a singleplayer B-movie survival shooter starring a dog soldier named Doug Barker, and it's the best Call of Duty Zombies alternative the author has played in ages. Players scavenge vidyacoins, manage 15 tactical pockets and manually load bullets while fighting zombies, lockdowns and a pursuing giant iceworm aboard a train hurtling through the Antarctic. It's available on Steam, and the author's praise is based on two hours of play on normal difficulty covering the first two acts.