G.U.N. employed these robots in several locations during their efforts against both Eggman and Sonic the Hedgehog and his allies prior to the averted cataclysm involving Space Colony ARK. Several Hunters were later stationed aboard a G.U.N. aircraft carrier that moved in off the coast of Avalon to assault the Avalon Egg Army, but proved unable to contend with the unexpected arrival of Dr. Eggman. (VG: SA2/SA2:B, StH: #253)
Hunter robots and other G.U.N. units were deployed under the command of E-123 Omega to defend Central City from an invasion by the Eurish Dark Egg Legion under Eggman's direct command. While the G.U.N. forces fought valiantly, the invasion was halted on Eggman's orders rather than through their efforts. (SU: #38)
- In the video games, the Gun Hunter is one of many varieties of G.U.N.'s Hunter series of robots, the others being Laser Hunter, Shield Hunter, and Trap Hunter.