The Operation 8 Title update for Gears 5 has 16 achievements worth 500 gamerscore.
Win 5 matches with Bernie COG character
Win a Versus match on Ephyra
Win a Control and/or KOTH match on 10 different maps
Win a Versus match on Tomb
Win a Versus match on Ritual
Win 10 matches of Execution
Reach Legend 25 in an Operation
Reach Re-Up 50
Reach Re-Up 60
50 Re-Ups, Inconceivable Campaign, Master All hives & Horde Maps , All Classes at Level 20
Win 10 matches in Versus Events
Win 5 matches with the Vrol character
Complete a match of Horde Frenzy on Atrium
Complete a match of Horde Frenzy on Command
Complete a match of Horde Frenzy on Turbine
Do 400,000,000 damage in Horde or Escape