Resolve the Apocalymon Wall Dungeon Glitch in Digimon UP: Step-by-Step Guide

Few things in a fan game hit harder than a progression-blocking glitch right when you're about to topple a major boss. The Apocalymon Wall Dungeon in Digimon UP is notorious for exactly this: players report getting stuck in geometry, falling through the floor, or having the boss fail to trigger. The good news? This is a known issue with a reliable set of fixes. The bad news? You'll need to do a little digging (and maybe some file tweaking) to get past it.

Digimon UP is a passion project built on an older engine, which means it inherits both the charm and the fragility of its foundation. Collision bugs in custom dungeons are common, especially in areas with complex wall geometry like the Apocalymon arena. The developers have been responsive, but patches come out slowly. Here's how to navigate the glitch and get back to your digital adventure.

Step 1: Confirm You're Hitting the Right Glitch

Not every wall issue is the same. The Apocalymon Wall Dungeon Glitch has three common symptoms. First, you might walk into a specific wall tile and get stuck, unable to move in any direction. Second, the boss room door may not open after defeating all enemies. Third, pieces of the floor might disappear, dropping you into a void loop that resets you to the save point.

If you're experiencing any of these, you're in the right place. The glitch usually occurs in the second half of the dungeon, near the large circular chamber before the Apocalymon boss arena. Knowing which symptom you have helps you choose the right fix below.

Step 2: Back Up Your Save File

This is the boring step that everyone skips and then regrets. Before trying any fix, locate your save file. On Windows, it's typically in %AppData%/DigimonUP/saves or inside the game's installation folder under a saves directory. Copy the entire folder to your desktop.

Why? Several of the following fixes involve modifying game files or resetting room states. If something goes wrong, you don't want to lose 30 hours of digivolution progress. Trust me, I've been there.

Step 3: Update the Game and Check for Patches

The development team has released several hotfixes targeting the Apocalymon dungeon specifically. Check the game's official Discord or the Itch.io page for the latest version. If you're running an older build, the glitch might already be fixed in a newer patch.

To update, download the latest installer and run it over your existing installation. Your save files should remain intact. If you're using a mod manager, disable all mods and try the dungeon again. Some community mods alter collision data and can trigger the glitch even on the patched version.

This tweet from the developer confirms the wall collision issue was flagged in version 1.2.3 and partially addressed in 1.2.4. If you're on 1.2.3 or earlier, updating is your first and best shot.

Step 4: Adjust Graphics and Performance Settings

This sounds unrelated, but it works. The game's engine can desync collision detection when the frame rate dips below 30 FPS or spikes above 60 FPS. In the dungeon, heavy particle effects from Apocalymon's room can cause frame drops that make the wall geometry behave unpredictably.

Open the settings menu and cap your frame rate to 60 FPS. Turn off shadows, reduce anti-aliasing, and disable volumetric lighting. If you're on a lower-end machine, drop the resolution to 720p. Enter the dungeon again and walk slowly toward the problem wall. The collision mesh should now align properly.

Step 5: Re-Enter the Dungeon with a Clean State

Sometimes the glitch is caused by a corrupted room state — the game remembers that you triggered a certain event but didn't complete it, leading to a broken environment. The fix is to force a clean reload.

Leave the dungeon entirely. Go to a different area, save the game, and exit to the title screen. Close the game completely, then relaunch. Load your save and re-enter the Apocalymon dungeon. This clears any lingering room flags and often resolves the stuck-in-wall symptom.

Step 6: Use the Known Workaround for the Wall Stuck

If you're physically stuck in a wall tile, there's a reliable workaround that doesn't require file editing. Equip a Digimon with a dash or charge move — Agumon's "Dash Attack" or Veemon's "Speed Blow" work well. Face the direction you came from and use the move. The game's movement logic for charge attacks sometimes forces the character out of stuck geometry.

If that doesn't work, press the dodge roll button repeatedly while mashing the movement keys in the opposite direction. This exploits the engine's "push" mechanic for collision escape. It takes about 10-15 seconds of frantic button mashing, but it works in most cases.

"I was stuck for an hour before I tried the dash trick. I felt like an idiot, but it got me out instantly. The devs really need to fix this, but at least there's a way around it." — Reddit user DigitalDestiny on the Digimon UP subreddit

Step 7: Modify the Game Configuration (Advanced)

If the above steps fail, you can edit the game's configuration file to disable certain collision features. This is an advanced fix and should only be attempted if you're comfortable with text files.

Navigate to the game's installation folder and open config.ini (or settings.cfg, depending on your version). Look for a line that says CollisionPrecision=High. Change it to CollisionPrecision=Low. This reduces the accuracy of the collision detection, which can prevent the game from registering you as "inside" a wall tile.

Also check for a line called EnablePhysicsOptimization. If it's set to true, set it to false. Save the file and launch the game. Enter the dungeon again. The wall should now behave as a normal wall rather than a sticky trap.

Step 8: Use a Community Save File or Skip Tool

As a last resort, you can bypass the glitch entirely by using a community save file that places you past the problematic section. The Digimon UP community has created a "glitch skip" tool that teleports your character to the boss room, bypassing the wall area. This is considered a "safe" mod by the community because it doesn't alter any game data — it just moves your coordinates.

Download the tool from the official Discord, run it as administrator, and select your save file. It will give you a list of available teleport points. Choose "Apocalymon Boss Room." Save again, and you'll be facing the boss directly. This is the nuclear option, but it works even if every other fix fails.

Step 9: Report the Bug to the Developers

After you've resolved the glitch, take five minutes to report it. The developers rely on community reports to identify and fix these issues. Include your save file, a screenshot of the glitch location, and a description of what you did to fix it. This helps them prioritize patches for the next update.

To report, join the official Discord and post in the #bug-reports channel. The team is active and often responds within a few days. They've been working on a comprehensive dungeon overhaul for version 2.0, so your report might directly influence the final design.

Patience and Persistence

The Apocalymon Wall Dungeon Glitch is frustrating, but it's not game-breaking. With the right combination of updates, settings tweaks, and community knowledge, you can get past it and finish the fight. Digimon UP is a labor of love, and like any fan project, it has rough edges. The good news is that the community has mapped every single one of those edges by now.

Once you're through, the Apocalymon boss fight is one of the best in the game — a multi-phase battle that tests your digivolution strategy and timing. Don't let a glitchy wall rob you of that experience. Try the steps above in order, and you'll be staring down the digital demon in no time.