Assertion: ratchet's weapon | /r/HasProperty | implemented in the series
Facets:
value: previously
type: TEMPORAL
Source sentences:
text: Weapons gain experience as previously implemented in the series, but in addition, the player can collect Raritanium crystals and use them to upgrade the weapon in additional ways beyond the experience path; weapon improvements are presented in a tree-like structure and require that all previous upgrades be obtained for that weapon first before later upgrades can be purchased.