The best replacement for rust is dayz.

The best alternatives to rust are rated as following:
★★★★★  dayz
★★★★  7 days to die
★★★★  corrosion
★★★  nether
★★★  minecraft
★★★  go
★★  starbound
★★  patina
★★  oxidation
★★  dayz standalone
★★  por 15
★  d
★  golang
★  haskell
★  die
★  nimrod
★  banished
★  rot
★  7 ways to die
★  julia
★  tarnish
★  lime
  insurgency
  not to rust
  space engineers
  shipment
  common rust
  seven days to die
  por15
  red rust
  corrode
  white rust
  metal rescue
  rust bullet
  water
  dayz sa
  naval jelly
  nuketown

Your alternative for rust is not listed? Suggest!
Speaking about rust, one probably shouldn't forget about controller.

Other search terms related to rust and their ratings are:
★★★★★ controller
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Google Trends

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rust
dayz
7 days to die