The best replacement for singularity is pull.

The best alternatives to singularity are rated as following:
★★★★★  pull
★★★  susy
★★★  bioshock
★★★  metro 2033
★★  firestorm
★★  stasis
★★  duality
★★  wolfenstein
★  black hole
★  virtus book
★  wide
★  bioshock 2
★  time shift
★  bulletstorm
★  warp
★  wide singularity
  timeshift

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Speaking about singularity, one probably shouldn't forget about event horizon.

Other search terms related to singularity and their ratings are:
★★★★★ event horizon
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