• Visiting all 22 levels: 44% (2 per new level, see below);
• Collecting all 1001 orbs: 24% (1 every 41-42 orbs);
• Collecting all 609 gems: 12% (1 every 50-51 gems);
• Getting all 18 dream mode medals: 18% (1 per medal);
• Triggering the final cutscene: 3%.

Levels count as visited once you hit a certain trigger:

• Westside Hotel: Osmo’s dialogue at the hotel door;
• Construction Site 1: door right before the elevator at the start;
• Breezy Valley: portal;
• Brewery: in the staircase, slightly past where you spawn after Taryn’s cutscene;
• Transit System: outside door;
• Train Chase: door before the zoomer;
• Hive Queen 1: in the small tunnel after you leave the zoomer;
• Strip Mine 1: portal;
• Jak Chase: the cutscene trigger when exiting the shop (/!\ it is possible to trigger Osmo's hotel dialogue at the same time, causing the chase to start without awarding you 2%);
• Tanker 1: where you spawn;
• City Port: tanker exit;
• Distillery: near the elevator at the top;
• Fish Cannery: small tunnel at the start of the conveyor belt;
• Emerald Forest: hut door;
• Construction Site 2: big door that you can clip over;
• Lumber Mill: portal;
• Strip Mine 2: door right before the first elevator leading to the hive queen (or entering through the portal, but only after you've watched Taryn's cutscene at the start of the level);
• Hive Queen 2: door after the last set of breakable walls (stay until the end of Osmo’s voice line or the 2% will be taken away upon warping);
• Tanker 2: door right before the elevator;
• Palace: where you spawn;
• Prison: door into the portal room;
• Final Boss: slightly past the locked door.