Destiny and Overwatch don't have a lock on over-the-top holiday gaming modes. Gears of War 4 just got a 99-cent Gearsmas Pack that adds some cheer to a mostly grim and dark game. The centerpiece is a special multiplayer event, Snowball Fight, where you have to fling snowballs at rivals using a custom Snowshot weapon. Akin to a real fight, you can't just reload -- you have to scoop up more snow ammo once you've run out of what little you have. There are also three ugly sweater-clad characters (JD, Kait and a Swarm Drone) and 24 holiday-themed weapon skins. Gearsmas lasts until January 4th, so you'll want to act soon if you're going to show off.
Microsoft and The Coalition are sweetening the pot, too. They're currently running a sale on GoW4 that slashes 35 percent off the game ($39 in the US) through December 28th, and there's a UIR Gear Pack coming later in the month. You should see an Easter Egg in the game on Christmas Day, as well. This isn't as thorough as what you get in a title like Overwatch (where there's a snowball fight and 100-plus cosmetic add-ons), but it's bound to make the game feel festive.