Here's some sweet tips to help guide you through with your Gears of War 3 multiplayer experience.
1. Choose your weapon wisely
The shot gun is your 'special little friend'. At close quarters it is your go to weapon. A shell to the face is a great way to bring your opposite down. The lancer sux for closer quarter combat - especially if your opposite has the shotty ready to hand. For bigger maps with a bit of room to play in go for a long range / short range combo such as the Longshot and Sawed Off Shot gun.
The retro lancer is less accurate than the lancer.
2. Danger hides behind that wall
There's a real chance as you go round that corner or duck in that alley or down the stairs, there's a dude that learnt his lesson not paying attention to GOW tip 1 and has his shotgun ready for your face. Approach corners with a wide berth, preferably not with the Longshot at the ready but you Gnasher.
3. There is truth to the phrase 'Brothers to the End'
This tip is key for enjoyable Gears game play - stick with your squad. If you get stranded, you will die - a great trick I learned from Halo multiplayer is to follow one of your squad and stick with them, looking for a double team. An experienced player should be viewed as a trusted guide. Follow them!
5. Know your escape route.
Every Halo player will know this game play tip - know your map's ins and outs. Where is everything? What connects that room? Where do the weapons spawn? Knowing the key elements of the map you are on will allow you to make quicker and better decisions.