- Estimated achievement difficulty: 5/10
- Offline: 62 
- Online: 2 
- Approximate amount of time to 1000: 75 hours
- Minimum number of playthroughs needed: 1
- Missable achievements: None
- Does difficulty affect achievements: No
- Unobtainable/glitched achievements: None
- Extra equipment needed: None
DLC: Hot Wheels
- Difficulty: 3/10
- Time to 500: 10+ Hours
- Unobtainable: None
DLC: Hoonigan Car Pack
- Difficulty: 3/10
- Time to 500: 5+ Hours
- Unobtainable: None
Forza Horizon 3 places you in an open world racer located in Australia. With more than 400 cars to drive, you can race, freeroam, discover and trade, on your own or with up to three friends in Co-op. Focusing less on multiplayer than the previous games of Horizon, this version has brought together all the goodies from previous games and beefed up with better graphics, physics and worldwide crossplay between Xbox One and PC players. You are the boss and are in control of what happens next in your career, your co-op sessions, and even with your club.
The career gives you more than enough opportunities to score a good amount of achievements. I would suggest to finish the career first which includes amassing 25 million fans for upgrades in the game. If you stick to the beaten path, your career also counts towards other achievements eventually so why waste time doing one thing if you could be doing several things at once. If you are completely committed to finishing this game, the career should take less than 40 hours of solid gaming and by that time you will have at least 600 on your gamertag.
Whereas multiplayer took a toll on people in Forza Horizon 2, it's much easier in Forza Horizon 3. If you want/need, only 2.5 hours needs to be spent online for both achievements. Although this game allows for co-op career (which basically is a different version of multiplayer), I would advise against it since a lot doesn't count properly. Still, if you want to hang out with friends, only use the co-op possibility for the achievements that really need it like "Road Buddy" as well as the PR Stunts.
Roughly 350 is for the taking at your own pace like discovering every road or smashing all boards. But also doing some events with friends or visiting the auction house can be viewed as mop-up achievements.
Hot Wheels DLC
Forza Horizon 3: Hot Wheels is an expansion for Forza Horizon 3. Hot Wheels transports you to a new Australian locale, sending cars barrelling through loop-de-loops, hurtling off ramps, and flying past mechanical dinosaurs. The expansion comes with a hand full of cars from the likes of the 1969 Hot Wheels Twin Mill, the 2011 Hot Wheels Bone Shaker, the 2012 Hot Wheels Rip Rod and the 2010 Pagani Zonda R just to name a few. You can play the game any way you want, and you don’t have to worry about missing anything.
In this DLC, there are a variety of achievements that you can unlock. There are collectables but no missable achievements, no difficulty achievements and everything can be done in co-op. Should you choose to play this DLC in co-op, it must be done online.
You first want to concentrate on completing and winning all 27 races in this DLC. Along the way, try to acquire as many medals as possible. You have to win a certain amount of medals for new events to open, so you might have to complete Bucket List challenges and special events before you can continue on. Once you’ve received 100 medals, the final race, Goliath, is available to you. Completing all 28 races will unlock six achievements.
Speaking of medals, there is 177 total to win. To get them all, you need 81 from the 27 races, 9 from the Bucket List challenges and 87 for the Danger Sign, Speed Trap, Speed Zone and Drift Zone special events. Acquiring all 177 medals will unlock three achievements. Then there are two additional achievements for just completing all five Bucket List challenges.
After you complete the final race, Goliath, 28 Championship races are unlocked. They consist of replaying the 28 races with an alternate setup to the normal Exhibition race. To make this easier, you can use blueprints to alter the attributes of the race. Completing these will unlock two achievements.
To unlock 10 more achievements, you have to use specific cars and complete certain event tasks, such as nailing 5 drifts in a Mustang, complete a race in a car built in 1968 or jump more than 500 feet during a Danger Sign special event in the Bone Shaker.
Remember I said this can be done in co-op? Well, there is one achievement where you need to win 20 online races with either a random player or a co-op partner (which is much easier). The last five achievements are for random tasks, such as finding the Barn, smashing all 25 reward boards, discover all 141 roads, swapping out a blueprint and taking a drive when you first start the DLC.
Overall the DLC is not hard at all as you can play it on what difficulty you want. It should take around ten to fifteen hours to complete.
Hoonigan Car Pack DLC
Forza Horizon 3: Hoonigan Car Pack is the latest expansion for Forza Horizon 3. It includes seven new cars for you to collect, race and customize as well as 10 new achievements for you to unlock. The achievements in this DLC are straightforward. There are no collectables, no missable achievements and everything can be done in co-op. Should you choose to play this DLC in Co-Op, it must be done online. There is one online achievement, so keep that in mind as you play. To unlock every achievement in this DLC, you must be driving a Hoonigan car.
Probably the easiest achievement in this DLC is “Squashed Banana.” All you need to do for this one is drive any Hoonigan car into a ‘Bananas for Sale’ sign while doing a combo (for instance, a drift). For “A Complete Hoonatic,” you must complete (not win) a Championship in all seven Hoonigan cars. For this one, you can simply blueprint a short Championship and use it for every Hoonigan car.
"Air Sick" is the only online achievement in this DLC. Even though it must be done in public freeroam, you can invite a friend to play against. And you just must complete a game of Infected, not win. For “Born to Hoon,” you need to 3-star 20 PR stunts (Danger Sign, Speed Trap, etc.; the 3-star requirements are different for each) in any Hoonigan car. The good thing about this is that you can replay the same stunt over again if you find one that’s easier for you, immediately rewind and do it again!
For the remaining six achievements, you must use specific Hoonigan cars to complete certain tasks, such as winning a street race in the 1972 “Napalm Nova”, getting 3 stars in certain PR special events with certain cars or getting a 300,000 point skill chain in the 1978 Ford Escort. You can attempt some of these as you’re going for “Born to Hoon.”
The game is shorter/easier to complete than previous iterations of Horizon. That said, the PR Stunts can be cumbersome due to random traffic present on the roads.