Yes, this is pretty easy to remember. Still, for completion purposes (and so I don't have to write at least a part of this into the rules), here are all achievements, sorted by the group they belong to:

World Completion (All awarded on entry of the boss portal)

Complete World 1 - Finish Marda Complete World 2 - Finish Grasi Complete World 3 - Finish Winda Complete World 4 - Finish Zipsa

Time Trials (All awarded on the time trials ending screen with met conditions)

Marda Runner - Finish a time trials run of Marda Grasi Runner - Finish a time trials run of Grasi Winda Runner - Finish a time trials run of Winda Zipsa Runner - Finish a time trials run of Zipsa Master of Marda - Finish a time trials run of Marda with ⪯5 deaths Master of Grasi - Finish a time trials run of Grasi with ⪯5 deaths Master of Winda - Finish a time trials run of Winda with ⪯5 deaths Master of Zipsa - Finish a time trials run of Zipsa with ⪯5 deaths

Game Completion (Awarded on level end)

Crown Hobbyist - Collect 7 crowns (7th: Upward) Crown Collector - Collect 13 crowns (13th: Spike Bite) Crown King - Collect 19 crowns (19th: Rounded) Crown Master - Collect 30 crowns (30th: Symmetry) Secret Character 1 - Beat Jar #1 (Requirement: 15 crowns) Secret Character 2 - Beat Jar #2 (Requirement: 25 crowns)

Many of these automatically lead to collecting other achievements as well (e. g. for Crown Master you also get Hobbyist, Collector and King on the way) and finishing a world in time trials also awards its "Complete World x" achievement, which means the optimal way to collect all achievements is to beat each world in time trial mode with five or less deaths after another, except Zipsa, which should be beaten in time trials after finishing both Jars, assuming at least 5 zipsa crowns have been collected before the run, otherwise the Jars should be beaten last. The problem with the All Achievements category is the five death requirement, as it can force a time trial reset, costing a lost of time, meaning this category requires a good amount of experience or careful play from the runner.