Yes, in fact you absolutely should because it is the only place to get new updates and content.
Please note the following points before proceeding:
– NO REFUNDS WILL BE PROVIDED AFTER RECEIVING A STEAM KEY.
– YOUR NON-STEAM RFACTOR 2 LICENSE WILL BECOME INVALID.
– YOUR ONLINE ACCESS SUBSCRIPTION TIME WILL BE LOST (ONLY APPLIES TO NON-LIFETIME LICENSES).
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