James Harden has the most games with 40+ points and 12+ assists, with 15 games.

Interpreted as:

most regular-season games by a player with 40+ points and 12+ assists

	NAME	GP	PTS	AST	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	REB	STL	BLK	TOV	PF	+/-
1	James Harden J. Harden	15	672	208	40.8	44.8	7.9	13.9	1.8	0.4	13.3	25.6	52.1	5.9	12.4	47.3	12.3	14.7	83.6	69.9	1.3	6.6	5.5	611	118	27	6	83	43	+223
2	Luka Dončić L. Dončić	9	397	119	40.0	44.1	9.0	13.2	2.3	0.8	14.7	26.0	56.4	5.1	10.6	48.4	9.7	12.0	80.6	70.5	1.1	7.9	3.9	360	81	21	7	35	24	+136
3	Trae Young T. Young	8	371	111	42.2	46.4	4.8	13.9	1.4	0.1	14.0	26.5	52.8	4.8	10.9	43.7	13.6	15.6	87.2	69.5	0.8	4.0	5.3	337	38	11	1	42	13	+30
4	Damian Lillard D. Lillard	7	311	90	39.5	44.4	3.4	12.9	1.9	0.1	13.4	24.0	56.0	8.3	15.3	54.2	9.3	10.0	92.9	78.2	0.3	3.1	1.6	277	24	13	1	11	10	+75
5	Russell Westbrook R. Westbrook	4	163	55	39.0	40.8	9.3	13.8	1.3	0.0	13.8	25.3	54.5	3.5	8.3	42.4	9.8	13.8	70.9	65.1	1.3	8.0	5.0	156	37	5	0	20	12	-5
6	Nikola Jokić N. Jokić	3	132	40	41.6	44.0	12.7	13.3	1.0	1.7	18.0	30.3	59.3	2.7	7.0	38.1	5.3	6.3	84.2	66.4	2.7	10.0	2.7	125	38	3	5	8	6	+15
7	Chris Paul C. Paul	3	123	45	37.7	41.0	5.0	15.0	4.0	0.0	12.7	20.3	62.3	3.7	8.0	45.8	12.0	12.3	97.3	79.6	1.0	4.0	3.0	113	15	12	0	9	7	+37
8	Allen Iverson A. Iverson	3	133	39	46.0	44.3	4.0	13.0	1.7	0.3	16.0	26.0	61.5	2.7	5.3	50.0	9.7	12.3	78.4	70.5	0.0	4.0	3.7	138	12	5	1	11	4	+49
9	LeBron James L. James	3	124	44	45.9	41.3	9.0	14.7	2.3	1.7	14.7	28.3	51.8	1.0	4.3	23.1	11.0	13.0	84.6	60.7	2.0	7.0	2.3	138	27	7	5	7	3	+16
10	Tim Hardaway T. Hardaway	3	121	44	47.0	40.3	5.0	14.7	2.0	0.7	15.0	26.7	56.3	2.7	7.7	34.8	7.7	8.3	92.0	66.5	1.0	4.0	4.0	141	15	6	2	12	8
11	Michael Jordan M. Jordan	3	129	38	42.3	43.0	8.3	12.7	3.0	1.3	15.7	28.0	56.0	0.0	1.3	0.0	11.7	12.0	97.2	64.6	2.0	6.3	2.7	127	25	9	4	8	8
12	Larry Bird L. Bird	3	132	38	46.7	44.0	10.0	12.7	2.7	1.0	16.7	29.3	56.8	2.7	6.3	42.1	8.0	9.0	88.9	66.1	1.0	9.0	5.0	140	30	8	3	15	11
13	De'Aaron Fox D. Fox	2	85	25	42.0	42.5	4.5	12.5	4.5	0.0	17.0	27.0	63.0	2.5	6.5	38.5	6.0	9.5	63.2	68.2	0.5	4.0	2.5	84	9	9	0	5	6	+16
14	Bradley Beal B. Beal	2	83	30	54.3	41.5	10.5	15.0	1.5	1.5	17.0	34.5	49.3	5.0	12.0	41.7	2.5	4.5	55.6	56.9	4.0	6.5	6.0	109	21	3	3	12	8	+10
15	Kobe Bryant K. Bryant	2	83	24	42.9	41.5	6.5	12.0	1.0	0.5	12.5	21.5	58.1	4.0	8.5	47.1	12.5	15.0	83.3	73.8	0.5	6.0	7.5	86	13	2	1	15	0	+16
16	Steve Nash S. Nash	2	84	25	45.1	42.0	4.5	12.5	0.5	0.0	15.0	25.0	60.0	6.5	11.0	59.1	5.5	7.0	78.6	74.8	0.5	4.0	4.0	90	9	1	0	8	5	-3
17	Stephon Marbury S. Marbury	2	90	24	43.5	45.0	3.5	12.0	1.0	0.0	16.5	26.5	62.3	2.0	4.5	44.4	10.0	13.5	74.1	69.4	1.0	2.5	2.5	87	7	2	0	5	5	+19
18	Kenny Anderson K. Anderson	2	87	26	46.5	43.5	7.0	13.0	2.5	0.5	14.5	29.5	49.2	0.5	3.0	16.7	14.0	16.0	87.5	59.5	3.5	3.5	3.5	93	14	5	1	7	7
19	Isiah Thomas I. Thomas	2	87	34	47.5	43.5	3.5	17.0	3.0	0.5	17.0	28.5	59.6	1.5	3.0	50.0	8.0	14.0	57.1	62.8	1.5	2.0	2.5	95	7	6	1	5	8
20	Shai Gilgeous-Alexander S. Gilgeous-Alexander	1	40	12	36.7	40.0	5.0	12.0	1.0	3.0	11.0	19.0	57.9	1.0	3.0	33.3	17.0	18.0	94.4	74.3	1.0	4.0	2.0	37	5	1	3	2	2	+16
21	Tyrese Haliburton T. Haliburton	1	43	12	36.7	43.0	2.0	12.0	0.0	1.0	14.0	21.0	66.7	8.0	12.0	66.7	7.0	7.0	100.0	89.3	0.0	2.0	3.0	37	2	0	1	3	2	+8
22	Darius Garland D. Garland	1	41	13	37.2	41.0	5.0	13.0	2.0	0.0	14.0	26.0	53.8	4.0	9.0	44.4	9.0	9.0	100.0	68.4	2.0	3.0	4.0	37	5	2	0	4	2	+18
23	Ben Simmons B. Simmons	1	42	12	38.1	42.0	9.0	12.0	1.0	1.0	15.0	26.0	57.7	0.0	0.0		12.0	13.0	92.3	66.2	3.0	6.0	4.0	38	9	1	1	4	2	-5
24	CJ McCollum	1	41	12	43.3	41.0	9.0	12.0	1.0	0.0	15.0	30.0	50.0	6.0	11.0	54.5	5.0	8.0	62.5	61.2	1.0	8.0	1.0	43	9	1	0	1	2	+17
25	D'Angelo Russell D. Russell	1	44	12	38.2	44.0	4.0	12.0	4.0	0.0	17.0	33.0	51.5	6.0	15.0	40.0	4.0	6.0	66.7	61.7	1.0	3.0	5.0	38	4	4	0	5	3	+13