The Rebuild series has filled many a train journey and lazy evening, simple enough to provide a mobile diversion but smart enough that the time doesn’t feel entirely wasted (see Tiny Tower, a charming bottomless pit of taps). Rebuild has difficulty settings, randomised cities and involving turn-based survivor management. It’s about zombies of course, but it’s also about pre-zombies, also known as human survivors. Beginning in a safehouse, the player’s gang must gather resources, scavenge for food and recruit other survivors. The ultimate aim, as the title suggests, is to rebuild the city, gradually making entire districts safe. Gangs of Deadsville, now available on Early Access, adds new events, a tech tree, survivor abilities and an entire faction system.