Once the purchase is complete, you can access Undertale by selecting the item library on Steam (above). It may interest you: How to earn Sen and fast experience in Sekiro: Shadows Die Twice In the latter case, I recommend that you follow my guide on how to create a Steam account. Sign in to an existing account, if you already have a Steam account or in the article Create a new account, to create a new account. Perfect, now you just have to press the button final and wait for Steam to finish downloading some necessary files the first time your client starts. Then check the box for acceptance of license agreement press siguiente twice in a row and click the button install. Once the download is complete, open the file SteamSetup.exe and click first yes, Then in following. Then you have to click on the green button Install Steam now, to start downloading the file. To download it, you just have to connect to the official Steam website and select the article Install Steam, present in the upper right corner. Undertale can be purchased directly from steam, one of the leading digital video game stores for PC, obviously also available for free for Windows.

For more details regarding the required technical specifications, I recommend that you take a look at the official Undertale Steam page.

Undertale download for mac