The game is available for purchase as either a solo purchase in digital format or physical format for the Xbox One, PlayStation 4, and Nintendo Switch that was released in Japan only. This game is also available as a dual purchase for both physical release or a digital bundle pack (excluding the Nintendo eShop) alongside Mega Man X Legacy Collection 2. In the case of the Switch dual release however, similar to the previous Legacy Collection releases, only this game has a physical cartridge, while Mega Man X Legacy Collection 2 was given a code for a free digital download, similar to Mega Man Legacy Collection 2.
- The collections include feature galleries with illustrations, music, videos, and merchandise.
- Unlike the previous Legacy Collection releases, the music gallery options have been improved. Players now have the option if they want to loop through each music track or not, along with the option to loop through all the music tracks for that specific game or the entire collection.
- The Day of Σ OVA that was originally part of the Mega Man Maverick Hunter X release is available.
- The ability to switch between the English and Japanese like in Mega Man Legacy Collection and Mega Man Legacy Collection 2. One notable difference is the ability to switch them by pressing a button based on the controller rather than going to an options menu.
- A brand new mode titled X Challenge, which is a challenge-based mini-game that allows the player to fight two bosses (Mavericks or Fortress Bosses) from the SNES or PS1 X Games (X1-X6) at the same time. Mega Man X Legacy Collection uses X Challenge Volume 1, and the third and final match from each Stage is exclusive to this version. Additionally, clearing every stage on Hard mode unlocks a secret final battle with Ultimate Armor X and Awakened Zero. This secret battle will allow the player to be restored to 100% upon entry, but unlike a normal challenge, the game will go straight to the credits after the battle whether the player wins or loses.
- In addition Ultimate Armor X can also transform into the Fourth Armor, Falcon Armor, and Shadow Armor to perform different attacks. Also if X is defeated first, Awakened Zero will transform into Black Zero for the remainder. In addition, both characters gain access to additional special weapons/techniques from X4-X6 when the other character is defeated first.
- High-resolution option to apply a filter for the games.
- Much like with Mega Man Legacy Collection and Mega Man Legacy Collection 2 each game has its own background frame. While each game only has one background frame, the player is now capable of accessing any of the background frames for all the games in the collection (X1-X4) regardless of which one is being played, along with the one from X Challenge, and two hidden unlockable frames (one for clearing any of the four games, and one for getting 50% of the Hunter Medals).
- Much like with the Challenges 2 from the original release of Mega Man 10, regular challenges are available in the form of Hunter Medals and earning these in most versions excluding the Nintendo Switch version will earn the player trophies/achievement points.
- When the credits for Mega Man X Legacy Collection are accessed from the Options in the main menu, it allows the player to play as X (based around gameplay from Mega Man X6) through the majority of the credits and be able to attack the credits, similar to the crossover game Super Smash Bros. for Nintendo 3DS and Wii U (excluding the official Capcom ones that are colored in a dark blue/yellow context). If enough is destroyed, sound effects will occur and eventually a music note will appear. If the player can do this before the switch over to the last part of the credits, a musical composition called Re: Future will occur.
- Though Re: Future can be seen in the Music Player, only the instrumental version can be listened to.
- A new gameplay option known as "Rookie Hunter Mode" is added to help inexperienced players. This mode works similar to the Super Armor option from Mega Man Legacy Collection 2 of reducing damage. In addition, the new mode can also prevent instant death from pits and spikes in Mega Man X4. As it is a new feature and not part of the games' original release, Rookie Hunter Mode can also be turned on/off anytime.
- Much like with Mega Man 8 in Mega Man Legacy Collection 2, the Japanese songs from the Makenai Ai ga Kitto Aru and One More Chance of Mega Man X4 are removed when playing it in Japanese for the Worldwide console/Steam release likely due to copyright issues.
- A similar case also applies to the English release of Mega Man X6 for Mega Man X Legacy Collection 2, but since all versions of the game contained Japanese songs, they have been replaced with brand new compositions.
- The salute shown in the Mega Man X4 opening cutscene was partly censored by removing the salute from General to avoid showing the full salute, possibly due to its similarity with the Nazi salute. Instead, the earlier salute from the Repliforce soldiers was intentionally slowed down to compensate for this to avoid affecting the flow of the opening music.
- FMV cutscenes in X4 are dimmed when flashes occur on screen.
- The original codes for unlocking Ultimate Armor X and Black Zero from the original PS1 X4 release is retained with the buttons from the non-Playstation controllers from the Nintendo Switch, XBox One, and Steam versions following the same fundamentals as the PS4 version. One example for the Switch version is ZR replacing R2.
- Strangely, the attract demonstration featured in the original release of X4 has been removed for some unknown reason. This is probably because a new-recorded attract demonstration is already featured in the music player function.
- The Select + Start soft reset method in the original X4 has been removed since X Legacy Collection uses a new soft reset method.
- Much like with Mega Man X Collection, the SNES games (along with X3 whose SNES version is in this collection but not the former) use a save system that is actually the games' password system that allows the player to use it without having to enter the correct code. The only drawback is this feature still has the same limitations for those passwords from the original games, such as not being able to maintain the Hadoken from Mega Man X since it can't be remembered with a password, and therefore has to be re-obtained.
These are the achievements obtained from collecting Hunter Medals for all versions of Mega Man X Legacy Collection. Completing these achievements on most versions excluding the Switch will also earn the player trophies/achievement points. Oddly, two of these have inaccurate descriptions, with additional requirements not listed in the game itself.
|Image||Name||Description||PSN Trophy Class||Xbox Live|
View 20 images across all four titles, then change the wallpaper to the secret image. (Note: Also requires the player to complete any of the games or every X-Challenge stage)
|Audio Signal Incoming||Listen to 10 tracks for long enough with the Music Player, and then listen to the secret track.
(Note: Also requires the player to complete any of the games or every X-Challenge stage)
|Identity Erased||Blast through the mystery of the staff credits and return to the future.||Bronze||30|
|He's Actually Called Vava||Complete the opening stage of any game in both the English and Japanese versions.||Bronze||20|
|Half the Saga||Complete Mega Man X1, X2, X3, and X4.||Gold||100|
|In Buster We Trust||Defeat any of the eight Maverick bosses in Mega Man X.||Bronze||5|
|Nobody Nose My Sorrow||Cut off Flame Mammoth's trunk in Mega Man X.||Bronze||5|
|Just Plain Dillo||Knock off Armored Armadillo's armor in Mega Man X.||Bronze||5|
|Gimp My Ride||Destroy an enemy Ride Armor in Mega Man X.||Bronze||5|
|Pretty (Devastating) In Pink||Use the Spiral Crush Buster to defeat a boss in Mega Man X.||Bronze||5|
|Re-Armed||Receive Zero's arm part in Mega Man X.||Bronze||20|
|Never Hearts to Be Careful||Obtain all Heart Tanks and max out X's energy gauge in Mega Man X.||Bronze||30|
|First Armor||Obtain all four armor upgrades in Mega Man X.||Bronze||15|
|How Long Will He Keep Fighting?||Complete Mega Man X (cannot be earned in Rookie Hunter mode).||Silver||30|
|Size Matters Not||Complete the opening stage of Mega Man X2 with a full energy gauge.||Bronze||15|
|Half the Sponge He Used to Be||Cut Wire Sponge in half in Mega Man X2.||Bronze||5|
|Covert Ops||Complete Magna Centipede's stage without being spotted by a single searchlight in Mega Man X2.||Bronze||15|
|Take Your Time||Watch Morph Moth's metamorphosis in Mega Man X2 without interfering.||Bronze||10|
|Dodge This||Use Giga Crush to score the final hit against any of the eight Maverick bosses in Mega Man X2.||Bronze||10|
|Friendly Neighborhood Mega Man||Use Silk Shot to grab an item in Mega Man X2.||Bronze||5|
|Second Armor||Obtain all four armor upgrades in Mega Man X2.||Bronze||15|
|The Price of Peace Is Often High||Complete Mega Man X2 (cannot be earned in Rookie Hunter mode).||Silver||30|
|All Units Stand By||Obtain all four Ride Armor chips in Mega Man X3.||Bronze||15|
|Fight Fair!||Destroy Vile MK-2's Ride Armor (DRA-00) in Mega Man X3.||Bronze||15|
|Speed Isn't Everything||Reach Bit without a Ride Armor and win without the aid of special weapons in Mega Man X3.||Silver||20|
|Power Isn't Everything||Reach Byte without a Ride Armor and win without the aid of special weapons in Mega Man X3.||Silver||20|
|Persistence Isn't Everything||Reach Vile MK-2 without a Ride Armor and win without the aid of special weapons in Mega Man X3.||Silver||20|
|Always Believe in Your Soul||Obtain the Hyper Chip in Mega Man X3.||Bronze||15|
|Third Armor||Obtain all four armor parts in Mega Man X3.||Bronze||15|
|To Save Mankind||Complete Mega Man X3 (cannot be earned in Rookie Hunter mode).||Silver||30|
|Pew Pew||Fire fully-charged shots using all of X's weapons in a single playthrough of Mega Man X4.||Bronze||10|
|Way of the Saber||Use all of Zero's special saber techniques in a single playthrough of Mega Man X4.||Bronze||10|
|Fully Charged||Obtain the EX Item, and have max. lives, energy, weapon energy, and full Sub Tanks in Mega Man X4.||Bronze||15|
|He Brought Fists to a Mech Fight||Use a Ride Armor to score the final hit against Magma Dragoon in Mega Man X4.||Bronze||15|
|It Ain't Ova Till It's Nova||Use Nova Strike to score the final hit against a boss in Mega Man X4.||Bronze||15|
|Fourth Armor||Obtain all four armor parts in Mega Man X4.||Bronze||15|
|Promise Me, Zero||Complete X's story in Mega Man X4.||Bronze||20|
|Mavericks After All||Complete Zero's story in Mega Man X4.||Bronze||20|
|Tragic Destiny||Complete Mega Man X4 (cannot be earned in Rookie Hunter mode).||Silver||30|
|Elite||Complete an X Challenge stage equipped with only the X-Buster.||Silver||20|
|What's Your Hunter Rank?||Check your own ranking in X Challenge.||Bronze||5|
|A-Class Hunter||Complete all X Challenge stages.||Silver||30|
|Image||Name||Description||PSN Trophy Class||Xbox Live|
|In the Heart of Battle||Learn the Hadoken in Mega Man X.||Silver||30|
|It's Over||Defeat Wolf Sigma in Mega Man X.||Bronze||20|
|Zero Squared||Gather all of Zero's parts and get rescued by the resurrected Zero in Mega Man X2.||Bronze||20|
|Attack Me if You Dare||Learn the Shoryuken in Mega Man X2.||Silver||30|
|It's Really Over||Defeat the Sigma Virus in Mega Man X2.||Bronze||20|
|He Wanted You to Have This||Receive Zero's beam saber in Mega Man X3.||Silver||20|
|It's Over... Right?||Defeat Kaiser Sigma in Mega Man X3.||Bronze||20|
|X-Treme Danger||Defeat Kaiser Sigma without the Hyper Chip in Mega Man X3.||Silver||30|
|It's Definitely Over||Defeat Sigma Gunner and Earth Sigma in Mega Man X4.||Bronze||20|
|True Hero||Complete Mega Man X4 as X without using the Ultimate Armor.||Bronze||30|
For the Playstation 4 version only, players who have earned all the trophies by completing all of the Hunter Medal challenges can earn another trophy based on the highest trophy class, the Platinum class, as a reward for mastering the game.
|Image||Name||Description||PSN Trophy Class|
|SA-Class Hunter||Earn all trophies and prove yourself as the ultimate Maverick Hunter.||Platinum|
- Both releases mark the first time the X series was released on an Xbox system.
- Both games are rated T for Teen by the ESRB and 12 by PEGI, making them the first two Mega Man games to have a rating over E10+ (for Everyone 10+) and 7.
- Most of the characters from the X series now have their original artwork updated to a more modern look.
- Mega Man X Legacy Collection is the third Mega Man game to be first released in the United States, the others being Mega Man Zero Collection and Mega Man 11.
- While the version of Mega Man X3 used in Mega Man X Legacy Collection is the SNES version, the arranged versions of Mega Man X3's opening and ending themes are also included in the music player mode in all versions.
- This marks the first time the SNES version of Mega Man X3 has been re-released in physical format.
- This and Mega Man X Legacy Collection 2 are the first PlayStation-released games in the series to include the Platinum trophy, the PlayStation Network's highest-ranked trophy, which is only rewarded to players who have collected all the other trophies and therefore have mastered the game.
- This and Mega Man X Legacy Collection 2 celebrates the 30th anniversary of the Mega Man series since its introduction in 1987. However, only the Japanese release also celebrates the 25th anniversary of the Mega Man X series since its introduction in 1993,
- This and Mega Man X Legacy Collection 2 are the only Nintendo Switch releases that do not use Amiibo support.
- An error in the Music Player mislabeled Toxic Seahorse by his Japanese name Acid Seahorse.