- Estimated achievement difficulty: 2/10 with a guide, 5/10 without [Achievement Difficulty Rating]
- Offline: 10 
- Online: 0
- Approximate amount of time to 1000: ~10 hours [Estimated Time to 100%]
- Minimum number of playthroughs needed: 1
- Missable achievements: None
- Does difficulty affect achievements: No difficulty
- Unobtainable/glitched achievements: None [please see the "NOTE" below]
- Extra equipment needed: None
NOTE: As of January 24th, 2018, the achievements have been fixed and they all unlock properly. If you obtained any before this date that are stuck at 100% Locked, simply load up the game and they will all unlock.
Welcome to Bridge Constructor Stunts, a spinoff of the original Bridge Constructor title. In this game, instead of just building bridges to support the weight of various vehicles, you'll be constructing ramps, bridges, and landings, and in addition to that you'll actually be driving the cars through the course you build. Many of the same concepts carry over, such as the types of materials, working within a budget, etc. Now you've also got to take into account launching and landing your vehicle so that it doesn't explode. As far as achievements go, there is one for collectibles which involves progressing in the game, three miscellaneous achievements, and the rest are all cumulative. The collectibles are the only thing that make this game difficult really, so with a guide this game becomes very easy, and you'll end up grinding pretty much all of the cumulative achievements for a decent amount of time.
Step 1: Progress and Collect Bolts:
The first thing you'll want to focus on is progressing to level 5-2. You need to collect 25 bolts, and there is one in every level aside from a few levels in World 1. If you collect the bolt in every level, you'll have 25 after completing level 5-2, and then you don't need to worry about progressing any further. The "Hardware Store" achievement solution has video guides to make this as painless as possible.
Step 2: Miscellaneous Achievements:
Now is the time, if you haven't already, to get the three miscellaneous achievements. They are for doing five flips in one jump with the pickup truck, four flips in one jump with the dump truck, and doing a jump with seven seconds of hang time. These are very easy to get as long as you try them on the right levels. Refer to the "Eighteen-Hundred," "Heavy Rotation," and "One Giant Leap" achievement solutions, respectively, for where to unlock each of these.
Step 3: Grind Cumulative Achievements
At this point it's unlikely you've earned any of the cumulative achievements, although you may be close to a couple depending on how many tries each level took to finish. You're more than likely going to have 2-3 hours of grinding to do. Refer to the respective achievements for the best places to do each one and how to best combine the grind to shorten it as much as possible. This wraps up the last of the achievements.
Bridge Constructor Stunts is a fun spinoff of the original game. The levels have a decent amount of variation, and as with the original game, the budgetary restrictions are what force you to be creative and think outside the box to meet all the requirements. This is essentially a puzzle game though, and as with any puzzle game you can just follow a guide to blow through all the levels, then you'll just be left with a decent grind. Nothing is too difficult though, so all in all it's a pretty fun and relatively simple completion.
[XBA would like to thank Necrophage33 for this Roadmap]