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