Here is the full list of all 50 Street Fighter X Tekken achievements worth 1,000 gamerscore.
Unlock all Achievements.
Obtain 300 Titles.
Clear 300 trials in Trial mode.
Clear ten trials in Trial mode.
Clear one trial in Trial mode.
Clear all of the missions in Mission mode.
Clear one mission in Mission mode.
Defeat 5 rival teams in Arcade mode on Medium difficulty or higher.
Defeat all of the bosses in Arcade mode on the hardest difficulty.
Clear Arcade mode on Medium difficulty or higher.
Activate Pandora 500 times.
Finish a round with Pandora 300 times.
Connect with 500 Cross Arts.
Finish a round with a Cross Art 300 times.
Activate Cross Assault 500 times.
Finish a round with Cross Assault 300 times.
Activate your Assist Gems 100 times.
Connect with 100 Quick Combos.
Connect with 500 Launchers.
Finish a round with a Super Art 300 times.
Connect with 500 Super Arts.
Connect with 500 EX Special Moves.
Connect with 500 Special Moves.
Activate your Boost Gems 100 times.
Have your replay downloaded 20 times in My Channel's Broadcast Mode.
View 50 replays in the Replay Channel.
Fight 500 matches over Xbox LIVE.
Fight 300 matches over Xbox LIVE.
Use a character in battle over 300 times.
Win a round without getting hit 100 times.
Win 100 matches over Xbox LIVE.
Fight 100 matches over Xbox LIVE.
Win 50 matches over Xbox LIVE.
Fight 50 matches over Xbox LIVE.
Create 10 lobbies in Endless Battle.
Win a match in Endless Battle.
Use Arcade Fight Request 30 times.
Get to C rank for the first time in Ranked Match.
Raise your battle class rank for the first time in Ranked Match.
Win 10 matches over Xbox LIVE.
Win 5 matches over Xbox LIVE.
Win in a Ranked Match.
Access the Store.
Go into Training mode 10 times.
Customize a Gem Unit.
Customize a character's color.
Customize your player Title.
Customize your player comment.
Clear all of the lessons in the Tutorial.
Clear one lesson in the Tutorial.