1. Have either the demolitionist or an explosive bunny kill a slime that drops bombs
2. Use those bombs to break trees
3. Make a workbench, a hammer, and a sword
4. Make those funky contraptions that trap slimes
5. Use the bombs you get from killing the trapped slimes to explore the caves
6. After collecting enough ore, through either the use of bombs or explosive traps, craft some armor and weapons, destroy more trees with bombs, and kill your first boss (optional)
7. Carry on this way until the Wall of Flesh fight
8. Farm explosive bunnies and use those to kill the Wall of Flesh (or fight the wall the normal way)
9. Farm in the underground hallow and corruption for souls
10. Use those souls to craft the mech summons
11. Kill the Destroyer first, building a box out of its reach and either using ranged weapons or boulder traps to kill them
12. Do this until you have a full set of hallowed armor and a weapon of your choice, then kill the other mechs
13. If you haven't already built housing, do so until the steampunker moves in (optional)
14. If you haven't already, kill either Skeletron or the Dungeon Guardian (if you decide to do this at or before step 6, I'd recommend farming for the shroomerang and using a hoik loop to kill the Dungeon Guardian) (optional)
15. Rig up a teleporter system in a tunnel and kill Plantera using it (assuming you followed the previous two optional steps), or kill her the normal way
16. Either raid the temple the normal way, or farm for the rod of discord so that you can go straight into the altar room without as much risk of death
17. Kill Golem
18. Find the tavernkeep if you haven't already, and do the Old One's Army until you can afford the Valhalla Knight set (you could also do the medal farming in prehardmode or in early hardmode, if you prefer that, but you'll also get some pretty good loot from T3 OOA) (optional, but will provide a bunch of great stuff and a really good set of armor)
19. mentally insane cultist + pillars
20. either kill Moon Lord the normal way, or use a bazillion rockets to do it quicker and with less risk
21. celebrate while listening to the credits music
I should probably say that I have never before tested this (obvi) but this should all work based off of my knowledge of the seed and game mechanics