Upon reaching Gate A, the player will be greeted by 3 NTF.
This ending requires the player to have successfully re-contained SCP-106. Upon reaching the end, the player will be met by 4 Chaos Insurgents saying: The player can use this, by running quickly down to the road and entering the tunnel.
If the player has not/failed to re-contain SCP-106, upon reaching Gate A, MTF will be too busy making sure 106 does not cross the bridge using the H.I.D turret.