Magic Johnson had the most games in the playoffs with 18+ assists, with 25 games.

Interpreted as:

most NBA playoffs games by a player with 18+ assist

	NAME	GP	AST	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	PTS	REB	STL	BLK	TOV	PF	+/-
1	Magic Johnson M. Johnson	25	489	39.8	17.4	7.0	19.6	2.2	0.3	6.0	11.9	50.2	0.3	1.3	21.2	5.2	6.2	83.9	59.6			3.9	995	435	175	55	7	97	61
2	John Stockton J. Stockton	10	199	41.5	17.0	3.2	19.9	2.4	0.4	5.5	10.8	50.9	0.7	2.1	33.3	5.3	6.5	81.5	62.2	0.7	2.5	2.9	415	170	32	24	4	29	26	+19
3	Rajon Rondo R. Rondo	5	97	44.0	11.0	9.0	19.4	1.4	0.0	4.6	14.0	32.9	0.2	1.8	11.1	1.6	2.8	57.1	36.1	2.4	6.6	3.4	220	55	45	7	0	17	16	+92
4	Jerry West J. West	3	55	47.0	34.3	3.7	18.3			13.0	25.7	50.6				8.3	9.7	86.2	57.4				141	103	11				12
5	Kevin Johnson K. Johnson	2	37	44.5	24.0	3.5	18.5	1.0	0.0	8.0	15.5	51.6	0.5	1.0	50.0	7.5	8.0	93.8	63.1	1.0	2.5	3.5	89	48	7	2	0	7	6
6	Doc Rivers D. Rivers	2	40	38.5	15.0	4.5	20.0	2.5	0.0	6.0	14.5	41.4	1.0	3.0	33.3	2.0	2.0	100.0	48.8	1.5	3.0	1.5	77	30	9	5	0	3	9
7	Johnny Moore J. Moore	2	38	39.0	25.5	4.5	19.0	1.5	1.0	11.5	21.0	54.8	0.5	2.0	25.0	2.0	3.0	66.7	57.1	0.0	4.5	2.0	78	51	9	3	2	4	8
8	Trae Young T. Young	1	18	40.0	25.0	4.0	18.0	1.0	0.0	8.0	26.0	30.8	3.0	11.0	27.3	6.0	8.0	75.0	42.3	1.0	3.0	2.0	40	25	4	1	0	2	3	+7
9	James Harden J. Harden	1	18	40.5	23.0	5.0	18.0	2.0	2.0	8.0	12.0	66.7	2.0	5.0	40.0	5.0	6.0	83.3	78.6	1.0	4.0	6.0	40	23	5	2	2	6	3	+8
10	Tony Parker T. Parker	1	18	41.9	15.0	5.0	18.0	3.0	0.0	6.0	20.0	30.0	1.0	4.0	25.0	2.0	4.0	50.0	34.5	0.0	5.0	2.0	42	15	5	3	0	2	1	+12
11	Steve Nash S. Nash	1	23	39.1	17.0	1.0	23.0	2.0	1.0	6.0	15.0	40.0	1.0	2.0	50.0	4.0	4.0	100.0	50.7	1.0	0.0	3.0	39	17	1	2	1	3	3	+17
12	Jason Kidd J. Kidd	1	19	39.8	16.0	16.0	19.0	3.0	1.0	7.0	14.0	50.0	2.0	8.0	25.0	0.0	0.0		57.1	4.0	12.0	5.0	40	16	16	3	1	5	2	+14
13	Avery Johnson A. Johnson	1	18	39.0	12.0	5.0	18.0	1.0	0.0	6.0	13.0	46.2	0.0	0.0		0.0	0.0		46.2	1.0	4.0	3.0	39	12	5	1	0	3	1
14	Mookie Blaylock M. Blaylock	1	18	40.0	13.0	8.0	18.0	4.0	0.0	5.0	14.0	35.7	2.0	5.0	40.0	1.0	1.0	100.0	45.0	3.0	5.0	1.0	40	13	8	4	0	1	0
15	Tim Hardaway T. Hardaway	1	20	51.0	27.0	1.0	20.0	5.0	2.0	11.0	22.0	50.0	1.0	5.0	20.0	4.0	6.0	66.7	54.8	0.0	1.0	1.0	51	27	1	5	2	1	3
16	Mark Price M. Price	1	18	45.0	18.0	4.0	18.0	2.0	1.0	6.0	13.0	46.2	1.0	3.0	33.3	5.0	5.0	100.0	59.2	0.0	4.0	5.0	45	18	4	2	1	5	1
17	Sleepy Floyd S. Floyd	1	18	46.0	23.0	5.0	18.0	1.0	1.0	9.0	12.0	75.0	3.0	4.0	75.0	2.0	6.0	33.3	78.6	0.0	5.0	6.0	46	23	5	1	1	6	1
18	Spud Webb S. Webb	1	18	30.0	19.0	7.0	18.0	1.0	1.0	3.0	8.0	37.5	0.0	1.0	0.0	13.0	16.0	81.3	63.2	0.0	7.0	2.0	30	19	7	1	1	2	2
19	Fat Lever F. Lever	1	18	39.0	19.0	16.0	18.0	2.0	0.0	8.0	14.0	57.1	0.0	0.0		3.0	4.0	75.0	60.3	8.0	8.0	5.0	39	19	16	2	0	5	3
20	Norm Nixon N. Nixon	1	19	43.0	21.0	1.0	19.0		0.0	9.0	16.0	56.3				3.0	4.0	75.0	59.1	0.0	1.0	0.0	43	21	1		0	0	4
21	Walt Frazier W. Frazier	1	19	44.0	36.0	7.0	19.0			12.0	17.0	70.6				12.0	12.0	100.0	80.8				44	36	7				3
22	Wilt Chamberlain W. Chamberlain	1	19	48.0	16.0	30.0	19.0			8.0	13.0	61.5				0.0	2.0	0.0	57.6				48	16	30				1