Emergence Day is postponed as long as we stand

Go back to the very beginning of the Sera`s agony and go through the triumphant story again from the perspective of Marcus Fenix ​​as if for the first time. In a world scorched by war and devastation, where the enemy came not from the sky, but right from under your feet, you can’t be safe anywhere. Bloodthirsty creatures are so eager to feast on your flesh and perhaps one day this is how your path will end, but certainly not today, because your task is to survive and kill as many monsters as possible. Death has become commonplace, and war is your daily work. In this world, you are just a part of a giant mechanism, just a gear of war. And in order for this nightmare to end, you need to get 100% of the achievements.

Complete Story Campaign

14 years have passed since E-Day, humanity continues to suffocate in the clutches of the Locusts, desperately fighting for its survival. In war, all means are good and for victory anything that can bring it even an inch closer is used. Become part of the Delta squad and you will have to go through a difficult path through fire, dungeons, the corpses of your comrades and hordes of enemies, and even do the unthinkable to go to hell and back - anything to give hope that this war is not yet lost. But is your enemy as simple as it seems?

Many achievements are story-related and unlock as you progress, but at the same time you will be required to complete all acts of the game on the highest possible difficulty, as well as complete all acts of the game in co-op mode.

Find collectibles

There aren't too many collectibles in the game, so this section can't be called difficult. You need to collect 33 COG tags, and even if you missed one of them, fortunately you can easily collect them by selecting the right act and chapter. Picking up a collectible automatically saves the game, so you don't need to get to the nearest checkpoint or finish the chapter in order to count them towards your progression.

Multiplayer battlegrounds.

Story Campaign was just a kind of training ground, the real war unfolds here. The Gears of War series has always been famous for some of the most time-consuming and grindy achievements.
Be prepared to spend a significant amount of time to unlock them all: you need to win matches, kill real players by the thousands, gain profile levels, play in co-op mode, and so on. Luckily, the game supports split-screen play on one device, so this can make it a little easier to get some achievements, especially if you play with a partner.

Please go to comments section to find a partner for multiplayer and co-op achievements or use this discussion topic for it too.

Spoiler alert

Despite the fact that the original game was released many years ago and has grown a community of fans and admirers, there are still a large number of people who will be getting acquainted with the game for the first time. Due to the fact that the game has many story achievements, and the descriptions of some of them are composed in a specific way, I inform you that the guide may contain certain spoilers for the story of the game. If you do not want to spoil your impression, I recommend leaving the guide, but returning later when you need help. I do not accept any claims regarding spoilers for the game.

More Gears?

A few years ago I already made a guide about Gears Tactics. This is an unexpected experiment with the game genre for the series, which will appeal to all fans of tactical isometric games like X-com. This guide will also help you get all the achievements in the game. Don't forget to check it out later.
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2719804404

Achievement Info

• Difficulty level of achievements: Hard.
  
• Total achievements: 56.
  
• Offline achievements: 38.
  
• Online Achievements: 18.
  
• Estimated time to complete all achievements: 120+ hours.
  
• Minimum number of passes for 100%: 1.
  
• Glitchy achievements: None.
  
• Missable Achievements: None.
  
• Achievements with difficulty levels: Yes.
  
• Required DLCs for 100% achievements: No DLC is required.