WELCOMEMS9999x Diamonds
Active for 8 months
89 worked7 failed
WELCOMEMS9999x Diamonds
Active for 8 months
89 worked7 failed
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Working Monster Slayer: Idle RPG Gift Codes
Browse the gift codes we have recorded for Monster Slayer: Idle RPG, with listed rewards and player reports. The redemption instructions below show the Settings and Gift Code menu path. Code availability can change, so check the listing and error message if a redemption fails.
Active codes
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How to redeem
- Open Monster Slayer and get to the main menu screen.
- Tap the Settings (Gear icon) in the top-right corner of the screen.
- Tap the Gift Code button in the menu list.
- Enter your code and tap Confirm.
- Rewards are typically added instantly.
Codes not working?
Can’t find where to enter the code?
Redeem at: Settings -> Gift Code
Already claimed this code?
Each code (including WELCOMEMS) can be claimed once per account. Switching devices does not let the same account claim it again.
Code rejected?
Use the copy button for WELCOMEMS or another listed code, then remove spaces before or after it. Capitalization matters: keep uppercase and lowercase letters exactly as listed. Check its status in the active list and code history. A rejection alone does not confirm that it has expired.
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Monster Slayer: Idle RPG details
Game links
- Developer
- Fansipan Limited
- Platforms
- Android, iOS
- Regions
- Global
- Released
- 2023
Similar games
Monster Slayer: Idle RPG is an action-packed single-player idle game developed by Fansipan Limited. You play as a lone Ranger protecting a kingdom from endless waves of creatures. The game combines strategy with AFK progression, and your character fights and levels up even when you aren't playing (typical for an idle RPG of this style). It is particularly… Read about the gameHide description
Monster Slayer: Idle RPG is an action-packed single-player idle game developed by Fansipan Limited. You play as a lone Ranger protecting a kingdom from endless waves of creatures. The game combines strategy with AFK progression, and your character fights and levels up even when you aren't playing (typical for an idle RPG of this style). It is particularly popular because it can be played offline, making it great for commutes or areas with bad reception. As you progress, you unlock new weapons, pets, and a "Tier" system that dramatically increases your power and let's you conquer more.
Codes are sourced from the game's official Discord server and official Facebook page.
Questions & answers
What's the best way to boost a character?
In Monster Slayer, the best way to boost your basic statistics is by using in-game Crystals. These can help you bridge the gap early without relying on in-game time mechanics. For late-game "Prestige Upgrades," you will need to collect Crushing Dust and Prestige Points, so it is best to start saving early. This is typical for idle RPG's of this type, so if you've played games from this genre before, you'll likely understand how to play this game effectively.
Does this game really work offline?
Yes, the game does work offline. You can play the Campaign, upgrade characters, and open chests without an internet connection. However, you will need to connect briefly to make real-money purchases, watch ads for bonuses, or participate in the "Leaderboard" events.
Do Monster Slayer: Idle RPG codes expire?
Some codes have a fixed expiry date; others are withdrawn without a published deadline. Check any expiry shown beside a code, and redeem it while it is still listed as active. The expired-code list keeps older codes for reference.
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Code history
WELCOMEMSActiveReward9999x DiamondsAddedFeb 9, 2026ExpiresNo expiry announced
1 recorded code. Scroll for earlier records. Status and dates reflect the latest recorded review.
Maintained by
Ethan OnyettHave a correction for this Monster Slayer: Idle RPG code list? send us a note and we'll review it.
MinuteTactics is an independent gaming publication and is not affiliated with Monster Slayer: Idle RPG's developer or publisher.