🌱 All Secret Seeds in Terraria 1.4.5

note: i made this guide in a bit of a rush, so it’s not perfect yet, but i’ll try to improve it later :)
secret seeds:

jaggedrocks - surface with holes/chasms
whatahorriblenighttohaveacurse - player becomes a vampire
arachnophobia - no spider caves/nests
xrayvision - full brightness/glowing effect
bringatowel - rain
jinglealltheway - christmas all the time
hocuspocus - halloween all the time
iamerror - bugged world generation
toadstool - glowing mushroom surface
monochrome - everything is gray (80s style)
winteriscoming - snow surface
truckstop - poop spread across the world
rainbowroad - RGB blocks spread across the world
planetoids - sphere-based world generation
suchgreatheights - higher surface
savetherainforest - giant MEGA trees
tooeasy - starts in hardmode
waterpark - flooded world
nightofthelivingdead - starts with blood moon and cemetery creatures
howdidigethere - random spawn
molepeople - underground world (no surface)
beammeup - random teleporters across the world
royalewithcheese - players in teams with different spawns
pumpkinseason - pumpkins grow naturally
abandonedmanors - underground "manors"
negativeinfinity - negative world
moretrapsplease - no traps
dualdungeons             [mobile] | > - two dungeons with maze-like biomes and more
doubledaringdangers [PC] | ^
thecarebearsmovie - extra floating islands spawn across the world
fishmox - no Corruption or Crimson spawns at world creation but once Hardmode begins, Hallow and infection biomes appear normally
invisibleplane - most terrain and objects are invisible
sandybritches - the surface layer is entirely desert
purifythis - the surface starts fully infected with Corruption or Crimson
we dont even test for that - portal

😖BONK