Epic is running a Gears of War 2 holiday event for the next 12 days. Each day brings a new (or returning) twist on the multiplayer modes, and increases the XP multiplier by one.
The full list, courtesy of the Epic forums:
1. “On the first day of Gearsmas Epic gave to me, a concussion from a smoke grenade.” – Dec 22 – 12 x XP multiplier.
2. 2 Flaming Bloodmounts (2 Bloodmounts with Flamethrowers every wave) – Dec 23 – 13 x XP multiplier.
3. 3 Extra Clips (3 extra clips of ammo in every weapon) – Dec 24 – 14 x XP multiplier.
4. 4 Frag grenades (Frag grenade pickups have 4) – Dec 25 – 15 x XP multiplier.
5. 5 Torque Bow Tags (Many rifle creatures carry Torque Bows in Horde) – Dec 26 – 16 x XP multiplier.
6. 6 Melee Monsters (All melee creatures Horde) – Dec 27 – 17 x XP multiplier.
7. 7 Sires a storming – Dec 28 – 18 x XP multiplier.
8. 8 Old School Gears Heads (4 v 4 MP) – Dec 29 – 19 x XP multiplier.
9. 9 Boomers Booming (Boomer squads on every wave) – Dec 30 – 20 x XP multiplier.
10. 10 Waves of Tickers (all Ticker Horde) – Dec 31 – 21 x XP multiplier.
11. 11 Wretches Wretching (Wretches with Shotguns) – Jan 1 – 22 x XP multiplier.
12. Some of the above (1, 3, 4, 8, 10) – Jan 2 – 23 x XP multiplier.
Bonus: Golden Lancer and Hammerburst for the duration of the event
I’ll probably wait until January 2 to jump in. Sounds like an excellent way to get tons of kills, XP, and my missing Horde achievements.