This game was developed to be playable comfortably with Steam Deck. We hope to pass the Steam Deck compatibility check.

If you have played this game with Steam Deck, please post your impressions in this article. Your comments will be used as reference for the Steam Deck compatibility review.

Thank you.

On October 22, 2025, RucKyGAMES began distributing "Add Cross".

『Add Cross』 is a pencil puzzle where you play with the numbers 1～9 inside the empty squares so that they become the numbers in the hint squares. Let's play casually with light effects!



- Numbers are written in "vertical hint squares" and "horizontal hint squares".
- Up to 1～9 numbers can be placed in one connected "blank square". The same numbers do not fit.
- squares interrupted by "hint squares" can have the same number.
- If you put numbers in all squares except the "hint square", it's clear!

【Price】 $2.99
【Number of players】 1 person
【Supported languages】 Japanese, English, French, German, Italian, Spanish,
Portuguese, Chinese (simplified), Chinese (traditional), Korean
【Rights notation】 ©RucKyGAMES
【Store URL】 https://store.steampowered.com/app/3899090/_/




10% Off Launch Sale to Celebrate Release!
【discount rate】 10%
【Duration 】22 October～ 5 November
(Dates and times vary by region)