The best replacement for ops is mw2.

The best alternatives to ops are rated as following:
★★★★★  mw2
★★★★★  obp
★★★★  modern warfare 2
★★★  mw3
★★  halo reach
★★  ocs
★★  black ops 2
★★  opps
★★  oops
★★  medal of honor
★★  ops+
★★  batting average
★★  battlefield 3
★★  iops
★★  modern warfare
★  halo 4
★  devops
★  oulu
★  condos
★  ac oulu
★  mw3 which is better
★  jippo
★  peace walker
★  oulu head to head
★  mw3 multiplayer
★  bad company 2
★  kooteepee
★  world at war
★  sjk
★  bf3
★  second sight
  mw3 wii
  halo
  reach
  millard
  bf2
  alpine access
  counter strike
  terps
  hifk
  mw3 poll
  micro ops
  killzone 3
  modern warfare 3
  green ops
  mw2 which is better
  fc haka valkeakoski
  condominiums
  black ops
  special forces

Your alternative for ops is not listed? Suggest!
Speaking about ops, one probably shouldn't forget about laser cel.

Other search terms related to ops and their ratings are:
★★★★★ laser cel
★ modio
★ hardline pro
You have in mind a companion for ops and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of ops in all years. Click on graph for more.
ops
mw2
obp