Slots Temple calls 'Zombies at the Door' a fun horror-style slot with 'high-quality graphics,' 'well-chosen soundtrack,' and a 'fun and innovative storyline.' The review points out engaging visual details and an atmosphere that 'hits the perfect tone between tension and excitement.' However, it also notes, 'payouts are on the low side' and the 'limited selection of bonus feature[s],' suggesting the game could offer more variety in features. No explicit player quotes are given.

LCB.org describes the slot as 'a decent online slot machine' with an 'interesting spooky theme, stunning graphics and animations, easy gameplay, and nice potential win in combination with medium volatility and a good RTP percentage!' The major highlight is an 'innovative Free Spins round that can increase the reel set and the number of pay lines not once but twice!' The reviewer notes the lack of numerous features but praises the design. No direct player quotes appear in the review.

AboutSlots praises the game's 'excellent' execution, noting 'easy-to-understand mechanics and a beautiful cartoony style that fits Peter & Sons perfectly.' The review highlights the immersive post-apocalyptic setting and adaptive paylines—20 in base game, expanding to up to 60 in the Super Free Spin round. The reviewer notes: 'The vibe is perfect as we can see and hear the zombies past the barricades,' and lauds the thematic design, stating that characters would 'fit into any zombie media like The Walking Dead.'

VideoSlot.com highlights the 'unique design, top-notch animations and a creepy soundtrack.' The review mentions 'rewarding gameplay' with a top prize of 9,500x stake and notes features like Wild Substitutions, Free Spins, and Super Free Spins. It describes Peter & Sons as a 'novice software developer showing a real zeal,' and supports the slot as an engaging, high-potential release. No direct player testimonials are provided.