Here is the full list of all 30 Guts and Glory achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Find and complete the "Retro Runner" Easter Egg level.
Complete the Easter Egg levels in the Halls of Glory.
Complete Official Track Group "The Glory Gauntlet," with no level skips.
Complete "A Delirious Challenge" in The Glory Gauntlet
Complete "A Kenshin Challenge" in The Glory Gauntlet
Complete "An Annoying Challenge" in The Glory Gauntlet
Complete "An Aussie Challenge" in The Glory Gauntlet
Complete "A Sasquatch Challenge" in The Glory Gauntlet
Complete "A Ridiculous Challenge" in The Glory Gauntlet
Complete "Tom's Froggy Challenge" in The Glory Gauntlet.
Complete Official Track Group "Desert Legend," with no level skips.
Complete Official Track Group "Stunt Tour," with no level skips.
Complete Official Track Group 'Child's Play,' with no level skips.
Complete any Official Track with Larry and make all your hobo friends proud!
Complete all "Day at the Park" tutorial tracks, with no level skips.
Complete Official Track Group "Rocket Science," with no level skips.
Complete Official Track Group "Family Vacation," with no level skips.
Complete 25 Community Tracks
Complete 5 Community Tracks
Catch an arrow... with your head.
Rate 20 Community Tracks
Wow, you voluntarily viewed the Credits List? Thank you for appreciating all the people that helped to create this crazy game. Here's your party hat... let's celebrate!
"Accidentally" maim/kill your own child excessively.
Complete any level in darkness.
Complete Official Track Group "The Great Outdoors," with no level skips.
Wreck/die 10+ times in 1 Track.
Seriously injure 50 pedestrians.
Complete Official Track Group "Welcome to Happy Valley," with no level skips.
Complete 10 Tracks with zero injuries to anyone.
Fall outside the map boundaries.