Borderlands® 4

Reach player level 10 - you'll pass it within the first hour or two of the campaign. Nothing to do but play.

Defeat any world boss - the named bosses that spawn in white bubbles around the map. They're common, so you'll get one early just by exploring and fighting.

Unmissable - pops on completing Main Mission 6, "Rush the Gate". Story-forced, nothing to chase.

Reach player level 30 - natural progression through the story and a bit of side content; comes well before the campaign ends.

Unmissable story unlock on finishing Main Mission 10, "Her Flaming Vision".

Unmissable - completes on Main Mission 14, "His Vile Sanctum".

Unlock 60 cosmetics (of roughly 189) - earned from mission rewards and challenge completions. You'll drift toward 60 just playing; top up via challenges if you're short.

Unmissable story progression on completing Main Mission 16, "Another Day, Another Universe".

The final main mission (20, "The Timekeeper's Order") - completing it beats the campaign, so this is your story-complete unlock. The endgame (Ultimate Vault Hunter, activities, world events) opens up afterward.

Tip Moxxi at her Bottoms Up bar (unlocked during Main Mission 7) - interact with the tip jar and drop in $100 or $1,000. A quick one-off once the bar's open.

Reach player level 50 (the base cap). You'll get there by finishing the main missions plus side missions and activities; if you're short at the credits, mop up side content or farm a boss.

Discover every map location in The Fadefields - unfog the whole region (fast-travel points, activities, named areas). Just explore thoroughly; the region map shows your discovery count, so chase down the last blanks. Not missable.

Complete the Airship world event - a random spawn in The Fadefields at Hungering Plain (destroy the targets across four airships). Luck-based spawn, like the other two world events.

Complete the Goredello world event - a random spawn in Terminus Range at Cuspid Climb (three timed rounds of enemies). It's a luck-based spawn, so keep an eye on that area; you can force more chances on a fresh character if it never turns up. See the roadmap for the world-event note.

Complete the Electi faction questline in Carcadia Burn - five missions (Enter the Electi Parts 1 & 2, The Council Divided, A Traitor Within, The Mole's Gambit). Follow the chain to the end.

Complete the Creep Impact world event - a random spawn in Carcadia Burn around Lopside/Stardown Point. Objective-based combat. The third luck-based world event; they turn up eventually.

Complete the Outbounder faction questline in The Fadefields - three missions (Null and Void, All Charged Up, Bound for Launch). Just follow the chain to the end; part of the Grassroots Campaigner side-mission set.

Complete the Auger faction questline in Terminus Range - four missions (Mob Mentality, Mob Rules, Angry Mob, Mob Justice). Follow the chain to the end.

Have a legendary (orange) item equipped in all nine gear slots at once - four weapons, Repkit, Ordnance/Grenade, Class Mod, Shield, Enhancement. Farm bosses and the endgame for legendaries and slot one in each; you don't need to keep them, just have all nine equipped together.

Discover every map location in Terminus Range - same as Unfaded: fully explore the region and clear the map's discovery count.

Complete all five Claptrap side missions (No Place Like Home, Sum of His Parts, Potty Mouth, Peak Performance, Father of the Glide) - a subset of the Grassroots Campaigner side-mission grind.

Reach Ultimate Vault Hunter level 5 - the hardest and most time-consuming achievement in the game. UVH unlocks after the story; levelling it wants UVH challenges, boss kills and Wildcard missions across four difficulty tiers. Budget several hours and save it for last, once your build and gear are strong.

Discover every map location in Carcadia Burn - explore the whole region to 100% its map.

Discover every map location in Dominion City - the last of the four region-discovery achievements. Fully explore it.

Collect all personal vehicles - 10 in total: six unlocked through story missions, the rest from reaching level 50 (a free update added one, easing the requirement). Comes together naturally as you progress and hit Master of Death and Dance.

Mad Ellie DLC story - completes on the DLC's Main Quest 1, "On Icebound Shores Abandoned". Forced within the pack; none of Mad Ellie is missable.

Mad Ellie DLC Main Quest 2, "Hearing Things" - forced story progression.

Complete all activities across the world - 53 in total (Order Silos, Safehouses, Ancient Crawlers, Abandoned Auger Mines, Order Bunkers, Ripper Drill Sites). All marked on the map and none missable; work through each type region by region.

Mad Ellie DLC Main Quest 3, "It Grows Below" - forced progression.

Bounty Pack 2 (Legend of the Stone Demon) story - completes on finishing the pack's mission "The Cursed Mine". Forced within the DLC; just play it through. The "clear every boss" achievement is the separate Fist of the Mountain.

Complete 80 contracts - the short repeatable jobs from Contract Boards at Safehouses and faction towns (bounties, collect, acquire, trace, patrol). They respawn, so just keep taking them; 80 adds up over an endgame session.

The Mad Ellie DLC finale - Main Quest 5, "Damnation Encroaches". Completing it finishes the story pack.

Mad Ellie DLC Main Quest 4, "What Lies Dreaming" - forced progression.

Missable. During the side mission "Vend of the Line", after you beat the Vend Zane boss you must use the Legendary Vending Machine in the exact order: sell 3 green (uncommon) items, then buy the $1 legendary. Do it before the mission ends - you can't replay it on the same character. If you slip, it's recoverable in post-story New Game+ or by joining a co-op game at that step. Pairs with Rift Incompatible as the game's only two missables.

An Easter egg in The Fadefields (The Howl): at the gazebo by the ocean, shoot the barrels in the right colour order - green, light blue, red, dark blue, yellow - to reveal a cardboard cutout of Dr. Tannis. Follow a video for the exact barrels.

Bounty Pack 2 (Legend of the Stone Demon): defeat every boss in The Demon's Domain, the pack's endgame arena. Work through each boss encounter until the Domain is cleared. Not to be confused with The Demon's Domain, which is the pack's story-mission unlock.

Complete all 98 side missions across the map. They're marked and revisitable, so work through them at leisure - one of the bigger time-sinks, but nothing here is missable.

Complete any one Manufacturer Challenge category - all challenges for a single manufacturer (Jakobs, Vladof, Maliwan, Torgue, Tediore, Daedalus, Ripper, Order). Favour one brand's guns for a while and it completes naturally.

In the Mad Ellie DLC, find and enter a randomly-spawning orange-red glowing rift, then defeat the boss inside. Not missable - just look for the glowing rifts around the Whispering Glacier.

Missable, and the classic trap: during the side mission "Exit Through the Rift Shop" you must punch (melee) Francis Oddman, not shoot him, to send him through the rift - shooting him locks the achievement for that character. His frozen body then shows up in Terminus Range (Windspear). Melee only. Recoverable via post-story New Game+ or co-op if you slip. The game's other missable is All Things Vend.

Complete any one Gear Challenge category - finish every challenge within a single weapon/equipment type (Pistol, SMG, Assault Rifle, Shotgun, Sniper, Grenade, Shield, Heavy, Repkit). Pick whichever type you use most and it fills in as you play.

Bounty Pack 2 (Legend of the Stone Demon): kill 50 Ordonite enemies - they appear throughout the pack's area, so just fight through until you've downed 50.

Complete all 3 activities on the Whispering Glacier (the Mad Ellie DLC map): The Gurgling Stent, Crisis Scar Weeping, Thrombosis Purge. Not missable.

Complete all 11 side missions in the Mad Ellie DLC (all on the Whispering Glacier). Not missable - work through the map's side quests.