EasyRPG
Collection of RPG_RT bugs for compatibility
There are various RPG_RT bugs out there which may be depended on by different games. I've created this issue to catalog them. At some point we may want to enable a compatibility mode switch for some of these bugs if we find games need them.
Please list your known RPG_RT bugs here:
- Break statements in nested loops don't obey scope. They always jump to the next
EndLoop. #1442 - Medicine usability is ignored in rm2k3 battles. #1482
- Panorama data is not saved in rm2k. #1485
- Panorama data is not cleared when map
save_countdoesn't match LSD. #1485 - If you save while the screen is panning it won't continue when you load.
I have a huge list.
Maybe I should do what I wanted to do a while ago while discussing how to approach any possible future fixes: Open a GitHub repo for RM2k(3) but for issues only, similar to https://github.com/Microsoft/wsl
Thing is just that it's a huge amount of work.
Flash saturation and Flash period (?) are not saved in the savegame. https://github.com/EasyRPG/Player/blob/1d5aedccce4b2fbf0328bbb264b4631108cb9597/src/game_screen.h#L101
In ShowPicture (2k only): When ShowPicture has no effect, then effects of MovePicture are ignored: https://github.com/EasyRPG/Player/blob/1d5aedccce4b2fbf0328bbb264b4631108cb9597/src/game_picture.cpp#L181
The "Moving into an event triggers it's interpreter (for the "move away feature")" results in "Waits" to finish faster (twice as fast when one event/player runs into it, three times when 2 and so on): https://github.com/EasyRPG/Player/blob/7d43de409e9696273989b4e199e5bb91c6d3c3c0/src/game_event.cpp#L733
Some japanese games use "-1" (which is the ID of the party when not in a Vehicle) as the target vehicle for "SetVehicle" which allows moving the party around (even across maps!) without triggering a transition. We don't fully emulate this (a normal teleport is executed): https://github.com/EasyRPG/Player/blob/4c589a4b2bda92c777d0bf8847928cc104e7bb36/src/game_interpreter.cpp#L1662
We emulate all these bugs because this really breaks games when you don't do it!
iirc the "Target select" window in the game menu (where you select a party member to use a item/skill on in the menu) ignores the "Half SP cost" attribute and shows the full SP cost but when executing the value is correct (halved).
Flash saturation and Flash period (?) are not saved in the savegame. Player/src/game_screen.h
Are you sure? It should be saved as SaveScreen.flash_current_level and SaveScreen.flash_time_left
Are you sure
No Im not, just did a code search.
This bug here: #1391 Negative E values which allows "enemy attacks can heal" is broken across all RPG Maker versions. (the expected behaviour is mentioned in the help file :))
Flash saturation and Flash period (?) are not saved in the savegame. Player/src/game_screen.h
Are you sure? It should be saved as SaveScreen.flash_current_level and SaveScreen.flash_time_left
The easyrpg variables he refers to are for continuous flashing. You need copies of these 2 fields to tell the flasher how to repeat the flash. #1501
Rm2k3 doesn't let you put all party members in the back using the Row command. At least 1 member must be in the front.
However, if you put some party members in the back row and then remove the front row members, you'll end up with a party with everyone in the back.
All items that trigger skills use the source of the skill to the highest level member of the party (first one if same level).
That means that items that trigger skills that have usage == self will always be used on the highest level character in the party.
Not sure if this is really a bug:
If an actor has an "Attack All" weapon and gets confused or provoked, he will only attack one ally or enemy.
Create a skill with:
- Heals Death
- 0 power, phys, mag, var
Use it on a dead actor in battle in 2k3,
The actor will revive with 1hp, but the displayed green number will say -1 :exclamation:
Set a move route on the player which changes the player graphic. Then save and load the game.
Upon loading the hero graphic is reset.
Here's a bug I observed a while back around panning and player movement.
tldr: Panning the map away from the player, then moving the player into that new camera frame, causes the camera to become offset until the player returns to the tile they were originally on.
Though frankly I doubt there's any game that makes use of this behaviour to necessitate replicating it.
There's a big move route save game bug in RPG_RT.
Create an event with some movement type. Then put a move route on it and make it move. Before the move route finishes, save your game.
Now load the game. After the event finishing moving, it's movement frequency will be set to 0.
This happens because the originalMoveFrequency variable in RPG_RT is not saved. This value is set when a move route starts and used to restore the movement frequency when the move route ends. When you load game it gets initialized to 0 and then
restored to the movement frequency when move route finishes.
This affects the hero, vehicles, and events.
We fix this bug in Player
RPG Maker editor only lets you do a maximum of 10 terrain damage per step. Given that hp can go into the thousands in 2k3, this makes terrain damage all but useless as a game mechanic.
Item and Skill Usability bugs
- Normal Skills are usable in the menu only if they heal hp, mp, or at least one state which persists after battle. Items which invoke normal skills are usable if they heap hp, mp, or any state.
- 2k3: Equipment which invokes a skill is always usable in battle, regardless of the skills.
- You can use this to invoke an escape or teleport in battle, which does nothing
- You can use this to invoke a switch skill which would normally not be usable in battle
- 2k3: Equipment which invokes a skill is usable on the map if and only if it targets self or allies.
- This means for escape, teleport, and switch skills, they will only be usable in the menu if the scope is set to ally. This is not possible in editor unless you change them to normal type, change the scope, and then change them back to the original skill type.
- This also means you can use switch skills normally only usable in battle.
- In the menu, Items which invoke skills require that at least one member of your party is alive and can use the item. This makes sense as the actor would have to "use" the item on another actor for them to receive the effect. However this check is only done for normal skills. Escape, teleport, and switch skills invoked by items are always usable even if nobody in the party could actually use the item.
Enemy AI Hidden Enemy Revive Bug
Enemy AI will try to use revive skills on both dead and hidden enemies. This is because RPG_RT check for Exists instead of only checking for death.
This bug exists in 2k and 2k3.
2k Battle: Death + other states bug
Create a skill which inflicts death and poison. Set poison's rating to 100 so it's not removed with death. Now use this skill on an enemy.
The enemy with "die" twice. The bug is that the RPG_RT code repeats the "death" message and animation for all states inflicted by the skill instead of displaying the other state messages.
2k3 Monster Blink + Death Bug
In 2k battle monsters do the blinking animation when they take damage, and then later fade out when they die.
In 2k3 because there are no messages or delays, when an enemy is killed it blinks and fades at the same time.
Revive Skill effects bug
Create a skill which raises hp, sp, atk, def, spi, agi and revives with 50% hit rate.
This skill will raise the parameters of dead characters, even if the revive part fails.
This happens in 2k and 2k3, but is most obvious in 2k as you see the messages on the console.
Item Sp recovery on dead allies bug
Medicine items which recover sp work on dead allies.
Item Sp recovery on dead allies bug
Medicine items which recover sp work on dead allies.
Not sure if that's a bug though... Death doesn't otherwise affect SP, so it would make sense for example to top up a dead allie's SP with an item and then revive them with a skill (if my character with the reviving skill isn't ready first)
Is just not intuitive. I can't remember any other game I played where you can buff stats of dead actors.
So maybe it is a feature but it didn't age well 🤔
Skill Usability States Bug
In Battle2k if you have a battler use a skill, and then something happens (example mp drain) which causes that skill to no longer be usable, the battler will do nothing that round.
This makes sense, but the way it's done skips checking for confuse, provoke, and processing states in general. The battler won't for example auto heal, or take poison damage, etc..
2k3 Battle Actor Event triggering action bugs
Whenever a battler does an action, the battle interpreter runs events (1) before action, (2) immediately after a switch is activated by an item or skill and (3) and after the action, allowing different page conditions in each case.
Due to a bug in the way they separated actor algo processing from enemies to implement CBA, step (3) does not occur when an actor uses an item, defends, escapes, or does the row command
Details in #2405
2k3 Battle Event Turns sequencing bug (Active ATB)
Create battle which event happens on turn 1 and another event that happens on turn 2 and has 1 enemy.
Right before the first battler acts, the turn will increment to 1, and the event will fire. Then the second battler, and the turn 2 event fires.
Now set atb to active, start the battle and enter the item or skill window. Stay in the window until the enemy atb fills up and they are ready to act, then perform the skill or item action.
What should happen: Event pages reset, Turn 1 event fires, enemy acts, Event pages reset, Turn 2 event fires, actor acts
What does happen: Event pages reset, Turn 2 event fires, enemy acts, actor acts
The reason is because the battle system incorrectly processes "next turn / reset pages" when a battler has a battle action scheduled and not when it runs. So anytime you can trigger multiple actions to queue up like this, events will run only once before all the actions and reflect the last turn numbers from all the queued actions.
2k3 Battle Normal + First Strike vs Initiative / Surround differences
In all of these battle conditions, the actors start with full ATB and enemies with empty ATB.
The first strike flag has an additional behavior in that the enemies will never do anything until at least one actor performs an action. For Initiative/Surround the enemies will attack you if you wait for their ATB to fill up.
The reason this works is because RPG_RT will still count up enemy ATB in first strike, but as soon as they act it will cancel their action. The first strike flag is cleared whenever an actor acts, so that allows enemies to act.
The RPG Maker editor forbids you from changing the first strike flag when the condition is not "Normal", however you can change the battle to normal, set the first strike flag, and then change it to initiative or surround to get the first strike behavior for those.
RPG_RT does clear the first strike flag for back and pincer attacks.
2k3 Battle enemy target branch command
The command has many bugs rendering it almost unusable. Details here: https://github.com/EasyRPG/Player/issues/2405#issuecomment-716298981
2k3 Battle Switch skill combo bug
Create a battle with 4 events, all activated by switch one, which print the page number and turn off the switch.
Crate one more event on turn 0 which enables a 3x combo for the hero for skill.
Finally, use a skill which activates switch 1.
What you would expect to see is "1", "2", "3". That is each time the skill is repeated the battle interpreter gets called again right after.
Instead due to some weird timing issues, you only get "1", "2"
2k3 negative attribute absorb numbers bug
Use a skill with a negative attribute that also aborbs on an enemy.
Instead of showing a green healing number, RPG_RT will show a negative number in white, looking like negative damage.