Here are the EASA requirements for the ATPL:
FCL.510.A ATPL(A) - Prerequisites, experience and crediting
(a) Prerequisites. Applicants for an ATPL(A) shall hold:
(1) an MPL; or
(2) a CPL(A) and a multi-engine IR for aeroplanes. In this case, the applicant shall also have received instruction in MCC.
(b) Experience. Applicants for an ATPL(A) shall have completed a minimum of 1500 hours of flight time in aeroplanes, including at least:
(1) 500 hours in multi-pilot operations on aeroplanes;
(2)
(i) 500 hours as PIC under supervision; or
(ii) 250 hours as PIC; or
(iii) 250 hours, including at least 70 hours as PIC, and the remaining as PIC under supervision;
(3) 200 hours of cross-country flight time of which at least 100 hours shall be as PIC or as PIC under supervision;
(4) 75 hours of instrument time of which not more than 30 hours may be instrument ground time; and
(5) 100 hours of night flight as PIC or co-pilot.
Of the 1500 hours of flight time, up to 100 hours of flight time may have been completed in an FFS and FNPT. Of these 100 hours, only a maximum of 25 hours may be completed in an FNPT.
(c) Crediting.
(1) Holders of a pilot licence for other categories of aircraft shall be credited with flight time up to a maximum of:
(i) for TMG or sailplanes, 30 hours flown as PIC;
(ii) for helicopters, 50% of all the flight time requirements of paragraph (b)
(2) Holders of a flight engineer licence issued in accordance with applicable national rules shall be credited with 50% of the flight engineer time up to a maximum credit of 250 hours. These 250 hours may be credited against the 1500 hours requirement of paragraph (a), and the 500 hours requirement of paragraph (b)(1), provided that the total credit given against any of these paragraphs does not exceed 250 hours.
(d) The experience required in (b) shall be completed before the skill test for the ATPL(A) is taken.