Black Mesa - How To VERY Easily Unlock The Digital Wizardry RARE Achievement!
In order to unlock the Digital Wizardry achievement, you must kill 10 enemies with a reprogramed sentry. This can actually be done VERY easily at the start of Chapter 4, We've Got Hostiles.
Start Chapter 4, and go through the red and white striped door that is slowly closing. Once you get past it, make a manual save before the laser tripwires (I thought these were tripwires for explosives, but they aren't). After saving, head into the next room where a Sentry will start shooting at you.
Quickly run up to the Sentry and grab it by interacting with it. You will now be holding the Sentry as it faces away from you, scanning for hostiles. Enemies will start spawning in the room, so point the Sentry towards them and it will kill them. Clear this room of enemies, or until the Sentry runs out of ammo, and the pause the game. Reload your save, and repeat the process. This should only take a few reloads to work, as you only need to kill 10 enemies this way, and I believe 5-6 enemies spawn in the room. Once 10 are dead, the achievement will unlock!
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