Previously Played Gears Games Weapon Skin Un-lockbles

Crimson Omen
Record at least one achievement in Gears 1, 2 and 3 on the SAME Gamertag.
Only the Gamertag that has done this will be granted the skin.
If you have just recently completed this, please allow 7 days for the skin to show up in your inventory.

Dark Omen
Complete the entire campaign on the original Gears of War 1.
Only the Gamertag that has done this will be granted the skin.
If you have just recently completed this, please allow 7 days for the skin to show up in your inventory.

Mars, Woodland Camo, Venus, Jupiter, Sun, Grease Gun, Racer:
Ultimate Edition BETA skins.
If you played in the beta at least one day you will receive these skins on ONLY the Gamertag that played in the BETA.

Gold
Play Ultimate Edition at least one day during launch week (ending September 4, 2015).
Skins will be granted up to ONE WEEK after September 4th.
Skins will not be available before September 4th.