Unresolvable:
- Transformation items only count the first time any player picks them up. Unresolvable due to no control over adding of transformations, thus this would require reimplementing transformations altogether

- P2-4 touching the big chest results in P1 jumping in rather than all players jumping in like with trapdoors and the cathedral light beam. Unresolvable because any player touching the big chest automatically causes p1 to jump in, which pauses the game and stops the mod from functioning.

- Player 1's card / pill name renders over P4's health and active. Unresolvable due to there being no way to render over the HUD, or move existing HUD elements around.

- P3 and P4's health will render off the edge of the screen. Unresolvable because health is rendered by the game, and there is no way to render over the HUD or move existing HUD elements around.

- Game constantly opens menu if a player's controller is disconnected, effectively a softlock.

- Players cannot join Lost or Judas immediately due to low hp.

- Players always start with starting items, even if not unlocked. Unresolvable due to no way to detect unlocked items.

- Things that do things on pickup tend to do them again when rejoining.

- Revived Lazarus's creep is unstoppable, so revived lazarus's ghost has a creep trail.

- Level generation trinkets / items do not work on players other than the main player. Currently a fix for this is implemented as level generation trinkets being impossible for P2-4 to pick up.

- Ventricle razor portals do not work for players other than the first player to enter them.

- Dying without extra lives instantly deletes the run, even if you get revived through the API before the game ends. This means that runs in which a player has become a ghost cannot be continued.

- Items such as Void, Smelter, Cambion / Immaculate Conception's states cannot be obtained or set and thus are lost when co-op players rejoin.

- D Infinity state not obtainable and thus cannot be rendered.

- Certain items only work when given to player 1, as a solution we've given these items to player 1 when player 2 - 4 picks them up while giving the consumables and costumes to player 2 - 4. The only issue with this fix is when player 1 is dead -- causing players 2 - 4 to lose these effects.

- If player 1 picks up Leo/rock-breaking effect all other players gain the effect, even as ghosts. If Leo/rock-breaking effect is picked-up directly by player 2 - 4 it works completely fine.

- Players 2 - 4 defy crawl space gravity without flight items.

- Players 2 - 4 standing on freshly spawned trap doors doesn't keep them closed causing the team to be pulled.

Work in Progress:

Report bugs here, I will update these lists as I get to them.