This may be where the three games differ the most.
Elden Ring The game throws you into the Underworld and says "figure it out". No quest markers, no intrusive mini-map, just a huge world to explore. You can spend 20 hours without touching the main quest and come across mini-dungeons, hidden bosses, obscure NPCs that unlock entire questlines. It's old-school level design, and it's masterful Metacritic 96, it's not for nothing.
Crimson Desert takes the opposite approach. The continent of Pywel is beautiful, but the experience is much more narrative. You follow Kliff and the Greymanes, and the story structures your progression. There is free exploration - hunting, fishing, crafting, camps to develop - but the main storyline remains omnipresent. Some love this structure, others find that it restricts freedom a bit. Big strength: the side activities are dense. Gliding, climbing like Assassin's Creed, mounted combat, sieges... The world feels alive.
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Dragon's Dogma 2 is a special case. Fast travel is deliberately limited (hello Portcrystals), which forces you to traverse the world on foot. And it is precisely by walking that the game shines: random encounters, reacting Pawns, terrifying nights. The problem is that some areas feel a bit empty. Natural corridors rather than a true open world at times. It has divided the community.
Our exploration verdict: Elden Ring, without hesitation. It is the absolute reference. Crimson Desert is more beautiful but more guided. DD2 is the most immersive in its best moments, but the most frustrating in its worst.