The guys over at Xbox360achievements.org have listed the Achievements for X-Men: The  Official Game thats coming out around the time of the new X-Men : The Last Stand movie and fills in the story in between X-Men 2 and 3. The game has 16 achievements which add up to the usual retail 1000 with achievements that range from going through the game, collecting the upgrades for the main characters to getting all the other achievements to getting the last one, which is a pretty lazy way to get 50 extra points.  The achievements are as follows:

Danger Room-(20)

This Danger Room Challenge for Iceman is unlocked by completing Act 1 of the game.

Danger Room-(20)

This Danger Room Challenge for Nightcrawler is unlocked by completing Act 2 of the game.

Danger Room-(30)

This Danger Room Challenge for Wolverine is unlocked by completing Act 3 of the game.

Xavier Institute-(0)

This Achievement is awarded when Nightcrawler's training mission is completed.

Xavier Institute-(0)

This Achievement is awarded when Iceman's training mission is completed.

Xavier Institute-(0)

This Achievement is awarded when Wolverine's training mission is completed.

Evolution-(125)

This Achievement is awarded when Iceman has been upgraded with all available mutations.

Evolution-(125)

This Achievement is awarded when Nightcrawler has been upgraded with all available mutations.

Evolution-(120)

This Achievement is awarded when Wolverine has been upgraded with all available mutations.

Champion-(70)

This Achievement is awarded to those who collect all Sentinel Tech as Iceman.

Champion-(70)

This Achievement is awarded to those who collect all Sentinel Tech as Nightcrawler.

Champion-(110)

This Achievement is awarded to those who collect all Sentinel Tech as Wolverine.

Secret Identity-(70)

This Achievement is awarded to those who collect all Weapon X Files as Iceman.

Secret Identity-(80)

This Achievement is awarded to those who collect all Weapon X Files as Nightcrawler.

Secret Identity-(110)

This Achievement is awarded to those who collect all Weapon X Files as Wolverine.

X-Men-(50)

This Achievement is awarded when the player profile accumulates 950 achievement score.