/sub [game_id]
— subscribe by game id/sub 620
/sub [steam store game link]
— subscribe by game link/sub https://store.steampowered.com/app/620/Portal_2/
/subs
— show your subscriptions
Every 4 hours the bot checks if there are any discounts and notifies all corresponding users (by sending a message to the original chat_id).
The bot is hosted on Heroku, here is a link https://t.me/steam_discount_notif_bot