The “Seriously Unserious Collection”, a bundle of comedy games, is now available on Humble Bundle.
It includes 13 games, among them Journey to the Savage Planet, Who’s Your Daddy?!, Trombone Champ, Barn Finders, Squirrel Stapler, Ghost Keeper, Astrologaster, Pilgrims, THE CORRIDOR, Bug Academy, Mr Toilet, Nerd Simulator and Comedy Night.
The tiers cost €4.52 (6 games), €7.24 (10 games) and €8.93 (all 13 games) as Steam keys. Part of the proceeds goes to Comic Relief. The bundle runs for about 21 more days.
Fun times with fantastic games await with the Seriously Unserious Collection, the comedy-focused bundle designed to tickle your funny bone! Be the first to tame planet ARY-26 by any means necessary in Journey to the Savage Planet. Blow your warm, brassy horn to more than 60 unique tracks and collect over 50 Tromboner Cards in Trombone Champion. Cause chaos as a baby who is making their father’s day a living hell in Who’s Your Daddy?!. Gaming should be fun before anything else. Laugh your way to the top with a curated collection of comical games and help support Comic Relief with your purchase!
Keys expire. Please redeem keys before 06/05/27.

The bundle page gives no information about Linux support. The Steam keys must be redeemed by June 5, 2027.
Source: Humble Bundle