Rage
61 Achievements
25-30h
Tinkerer
Construct 50 Engineering Items
23.5%
How to unlock the Tinkerer achievement in Rage - Definitive Guide
I waited till after the "Shrouded Bunker" mission, and I collected the recipe, and enough RC parts to have 15 RC's on standby ready to build.
Next, make a save, or just save your game like normal. Then go to the engineer section of the back button and find the RC, or whatever you have the most of; then click "Build All." It will build all of them one right after another. If you don't have a lot of one thing just build everything in your inventory you are able to.
After you built all you can, reload your game, and do it all over again. After you have hit 50 things engineered the achievement will pop.
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There are different items you can create in the game through Engineering. You must have the schematic/recipe first and most will come as you do quests. The easiest item to make is a Bandage. You will get this early on in the game. You only need 2 items (Antiseptic Forumula and Cloth Rags). They are inexpensive.
Example: Buy 50 Cloth Rags and 50 Antiseptic Formula. This will cost you a total of $600 with discount, more if not. Go into Engineering in the menu and make the bandages. The achievement unlocks after exiting the screen.
Construct any 50 items in the engineering tab. Bring it up by pressing and then and until you reach the engineering tab.
Same as Arts and Crafts however this time you need to construct 50 items. Constructing items can be anything in engineering and you can only construct items when you have a recipe/Schematic. Once you construct 50 items the trophy will unlock, you can check you progress in the statistics section of the menu.