Free, but not Freeware

Can be obtained and played without paying (legally), but does not have any other similarities with freeware, such as no rights to freely re-distribute them (without permission). Nor are these in public domain.

No payments required does not include any potential internet usage costs, as that's too generic to be included (same as electricity bill and costs of acquiring the platform and related hardware). Otherwise you'd need to consider that UVL itself is not free.

This can possibly be used as a fallback for other non-freeware-but-still-free licenses that have details missing (though such cases should be fixed).