Quick Guide
- Active codes and their exact rewards are listed below.
- Redeem through the in-game menu on Android, or via the Bandai Namco web portal on iOS.
- Bookmark this page — codes for this game drop around events and update cycles.
SLIME – ISEKAI Memories is the mobile RPG based on the That Time I Got Reincarnated as a Slime anime — a squad-builder with gacha pulls, skill customization, and a story mode that actually follows the source material. The core loop is collecting and upgrading characters, running through story content and limited events, and pulling for SSRs when the banner looks worth it. It’s paced for sessions in the 20–30 minute range, though event periods push that.
Codes for this game come from Bandai Namco through Twitter/X announcements, live streams, and patch notes. The haul varies — sometimes it’s 300 crystals, sometimes a guaranteed SSR pull. New players benefit the most from stacking early codes before the grind starts feeling long.
Active SLIME – ISEKAI Memories Redeem Codes — July 2026
These are the codes confirmed working as of this update.
| Code | Reward |
|---|---|
| SLIMEFALL25 | 300 Crystals + 1× Recruit Ticket |
| SSRGIFT2025 (New!) | 1× Random SSR Character |
| POTIONPACK25 | 5× EXP Potions + 5× Stamina Jellies |
| GEARBOOST1025 | 1× 2★ Weapon + 10× Gear Upgrade Hammers |
Worth noting: SSRGIFT2025 is the obvious priority here — a free SSR is a free SSR. SLIMEFALL25 pairs well right after if you’re building toward a new pull. GEARBOOST1025 is the least exciting of the batch; mid-level players will find more use for it than early-game accounts.
How to Redeem SLIME – ISEKAI Memories Codes
Redemption works differently depending on your platform. iOS has an extra step because of App Store restrictions — worth knowing before you start.
Android:
- Open SLIME – ISEKAI Memories and wait through the loading sequence
- Tap the Menu button in the top-right corner (three horizontal lines)
- Select the Others tab
- Tap Serial Code
- Enter your code exactly as it appears above — caps matter
- Tap Confirm — rewards go directly to your Gift Box
iOS:
- Open a browser and go to the official Bandai Namco serial code page
- Log in with your Bandai Namco ID (create one if you haven’t — it’s tied to your account progress)
- Enter your Player ID, found under Settings → Player Info inside the game
- Type in the code and tap Submit
- Reopen the app — rewards will be waiting in your Gift Box
Copy-paste the codes rather than typing them manually. The difference between the letter “O” and the number “0” has cost more players a code than they’d admit.
When Codes Don’t Work
The most common reason is expiry. Bandai Namco doesn’t always announce when a code goes inactive — it just stops working. If a code was active last week and isn’t now, that’s almost certainly what happened.
Some codes are time-limited to specific events. If a code circulated during a collaboration or anniversary stream and you’re redeeming it weeks later, the window may have closed. The code was real; it’s just gone.
iOS players occasionally run into a mismatch between their Bandai Namco ID and their Player ID. If the web portal throws an error, double-check that the Player ID you entered matches exactly what’s shown under Settings → Player Info — they’re different from your username.
Typos are more common than people expect, especially on mobile keyboards. A stray character at the end, an extra space, a lowercase letter where uppercase is required — any of those will return an error that looks like the code is invalid when it isn’t.
There’s no confirmed daily redemption cap for SLIME – ISEKAI Memories at the time of this update, but some Bandai Namco titles do enforce a one-per-day limit. If you hit an unexpected wall, try again the following day before assuming the code is expired.
Expired SLIME – ISEKAI Memories Codes
These codes no longer work. Listed here for reference.
| Expired Code |
|---|
| SLIMEWELCOME |
| BDNM2024 |
| RIMURU1ST |
| SLIMEXMAS24 |
Where New Codes Come From
Bandai Namco releases codes through a few consistent channels. The official Twitter/X account (@SlimeIsekaiMem) is the most reliable source — codes typically drop during live stream milestones, update announcements, and collaboration events. Turning on post notifications is worth it if you want the code before it expires.
The official Discord server runs an #announcements channel where moderators post new codes, often with a note on expiry windows. Reddit’s r/IsekaiMemoriesGame fills in the gaps, particularly for codes that appear in YouTube streams from smaller creators or regional promotions.
The Bandai Namco official site occasionally buries a code in patch notes. It’s not the first place to check, but after major maintenance windows, it’s worth a scan.
SLIME – ISEKAI Memories — Worth Knowing
The game gets a steady stream of collaboration events tied to the anime release schedule. Those events tend to drop the better codes — guaranteed SSR pulls rather than the usual crystal bundles. If you’re going to bookmark one page and check it periodically, do it around major patch cycles rather than checking daily. The codes don’t turn over that fast, but the event ones can expire quickly when they do appear