If you plan to dive deep into the offline multiplayer experience, here are some pro tips:

GW2 features a variety of ways to play multiplayer maps and modes with AI bots:

With Easy, Normal, Hard, and "CRAAAZY" difficulties, Solo Ops is a fantastic way to grind for XP and learn the spawn patterns of boss waves like Giga-Gargantuar or Super Bean. 3. Solo Play: Full Multiplayer Maps, Zero Latency

Across the street, the graveyard burst open. Without the influence of human commanders, the zombies moved with a strange, eerie synchronization. A group of Browncoats

From the main menu, select or jump into the "Backyard Battleground" and approach the large "Multiplayer Portal." Even offline, the portal gives you the option to launch any of the standard multiplayer modes with AI bots.