Create a free account on the site, pick a product or bundle in the Store, then checkout with BTCPay (Monero) or NOWPayments (crypto). Your license syncs to the same login in the launcher.
Internal builds run in-process with the full feature set. External builds use an overlay and do not inject into the game — better for stream-safe setups where supported.
Yes. Checkout requires a signed-in Epsilon account so we can attach the license to your username.
After your payment is confirmed on-chain. BTCPay and NOWPayments webhooks mark the order complete and issue your license automatically — usually within minutes.
BTCPay — Monero (XMR) through our self-hosted BTCPay Server.
NOWPayments — hosted crypto invoice (XMR and other coins depending on NOWPayments settings).
Yes on the Pro bundle and Starter tier. It can also be purchased standalone from the store.
See our Terms of Service — Epsilon is intended for private / single-player use unless you own the server and accept the risks.