Achievements
Achievements and trophies
Counts
Steam's app details list 29 achievements. The PlayStation list has 30 trophies, the extra one being platinum. English names published by PowerPyx include Blood Tells, Flammable or inflammable?, Snakes speared in the ruins, The King is dead, long live the King, Talos Aversion, Blood for Blood, Death… killed?, All that glitters is not gold., I am Arthur, King of the Britons, Succubued to her wounds…, Shadow Work, Finish Hector's work, and Die monster! You don't belong in this world!.
Further names from the same list include Pick a card, any card, Armed to the Fangs, Jack of All Trades, Stuff of Legends, Always the same roof, Belmont's fall, and the collection and ending trophies. Shadow Work is its own page because the search is specific.
Tasks that are clear without every name
The set asks you to collect all arcana, all weapons, one weapon of each family, a legendary weapon, all heart upgrades, all clues, and all mirrors. It also asks for 666 candles, 19.86 kilometers, a clear in under four hours, each of the three endings, a 100% mark, and a kill with a monster spell while a whip is equipped. Boss trophies track the guardians and the late fights, including The Self and Dracula.
What I ran into
I cross-read the English names against a Chinese trophy table that had translated Shadow Work into a phrase I almost treated as 'missing'. The English name exists. The shadow-work page is the correction.
Questions
How many achievements are on Steam?
29, in the Steam app details. PlayStation has 30 trophies including platinum.
Is there a speedrun trophy?
Yes. One task is a clear in under four hours.