Heroes

28 research items: cost, time and requirements per level.

28 research items in tree order. Per level: power, cost, base research time (without speed bonuses) and requirement; the total of all levels below.

Infantry Firepower I

Level	Power	Food	Iron	Coin	Time	Requirements
1	200	4,600	4,600	13,700	19 min	Tech Center Lv. 5
2	900	54,700	54,700	164,000	41 min	Tech Center Lv. 8
3	2,000	168,000	168,000	503,900	1 h 42 min	Tech Center Lv. 11
4	4,400	785,200	785,200	2,355,700	7 h 15 min	Tech Center Lv. 14
5	8,800	2,739,500	2,739,500	8,218,400	2 d 1 h 33 min	Tech Center Lv. 17
Total		3,752,000	3,752,000	11,255,700	2 d 11 h 30 min

Infantry ATK I

Level	Power	Food	Iron	Coin	Time	Requirements
1	300	9,100	9,100	27,300	24 min	Tech Center Lv. 6, Infantry Firepower I Lv. 1
2	1,100	87,500	87,500	262,400	53 min	Tech Center Lv. 9
3	2,900	419,900	419,900	1,259,700	2 h 33 min	Tech Center Lv. 12, Infantry Firepower I Lv. 3
4	5,700	1,099,300	1,099,300	3,297,900	14 h 30 min	Tech Center Lv. 15
5	10,700	3,561,300	3,561,300	10,684,000	3 d 12 h 14 min	Tech Center Lv. 18
Total		5,177,100	5,177,100	15,531,300	4 d 6 h 34 min

Infantry DEF I

Level	Power	Food	Iron	Coin	Time	Requirements
1	300	9,100	9,100	27,300	24 min	Tech Center Lv. 6, Infantry Firepower I Lv. 1
2	1,100	87,500	87,500	262,400	53 min	Tech Center Lv. 9
3	2,900	419,900	419,900	1,259,700	2 h 33 min	Tech Center Lv. 12, Infantry Firepower I Lv. 3
4	5,700	1,099,300	1,099,300	3,297,900	14 h 30 min	Tech Center Lv. 15
5	10,700	3,561,300	3,561,300	10,684,000	3 d 12 h 14 min	Tech Center Lv. 18
Total		5,177,100	5,177,100	15,531,300	4 d 6 h 34 min

Infantry HP I

Level	Power	Food	Iron	Coin	Time	Requirements
1	500	27,300	27,300	82,000	31 min	Tech Center Lv. 7, Infantry ATK I Lv. 1, Infantry DEF I Lv. 1
2	1,500	140,000	140,000	419,900	1 h 8 min	Tech Center Lv. 10
3	3,800	713,800	713,800	2,141,500	3 h 49 min	Tech Center Lv. 13, Infantry ATK I Lv. 3, Infantry DEF I Lv. 3
4	7,100	1,539,000	1,539,000	4,617,100	1 d 3 h 32 min	Tech Center Lv. 16
5	13,800	6,232,300	6,232,300	18,696,900	5 d 14 h 45 min	Tech Center Lv. 19
Total		8,652,400	8,652,400	25,957,400	6 d 23 h 45 min

Tank Firepower I

Level	Power	Food	Iron	Coin	Time	Requirements
1	700	54,700	54,700	164,000	41 min	Tech Center Lv. 8, Infantry HP I Lv. 1
2	1,800	168,000	168,000	503,900	1 h 42 min	Tech Center Lv. 11
3	4,200	785,200	785,200	2,355,700	7 h 15 min	Tech Center Lv. 14, Infantry HP I Lv. 3
4	8,600	2,739,500	2,739,500	8,218,400	2 d 1 h 33 min	Tech Center Lv. 17
5	15,900	7,478,800	7,478,800	22,436,300	8 d 10 h 8 min	Tech Center Lv. 20
Total		11,226,200	11,226,200	33,678,300	10 d 21 h 19 min

Tank ATK I

Level	Power	Food	Iron	Coin	Time	Requirements
1	800	87,500	87,500	262,400	53 min	Tech Center Lv. 9, Tank Firepower I Lv. 1
2	2,600	419,900	419,900	1,259,700	2 h 33 min	Tech Center Lv. 12
3	5,400	1,099,300	1,099,300	3,297,900	14 h 30 min	Tech Center Lv. 15, Tank Firepower I Lv. 3
4	10,400	3,561,300	3,561,300	10,684,000	3 d 12 h 14 min	Tech Center Lv. 18
5	20,200	13,461,800	13,461,800	40,385,400	11 d 18 h 59 min	Tech Center Lv. 21
Total		18,629,800	18,629,800	55,889,400	16 d 1 h 9 min

Tank DEF I

Level	Power	Food	Iron	Coin	Time	Requirements
1	800	87,500	87,500	262,400	53 min	Tech Center Lv. 9, Tank Firepower I Lv. 1
2	2,600	419,900	419,900	1,259,700	2 h 33 min	Tech Center Lv. 12
3	5,400	1,099,300	1,099,300	3,297,900	14 h 30 min	Tech Center Lv. 15, Tank Firepower I Lv. 3
4	10,400	3,561,300	3,561,300	10,684,000	3 d 12 h 14 min	Tech Center Lv. 18
5	20,200	13,461,800	13,461,800	40,385,400	11 d 18 h 59 min	Tech Center Lv. 21
Total		18,629,800	18,629,800	55,889,400	16 d 1 h 9 min

Tank HP I

Level	Power	Food	Iron	Coin	Time	Requirements
1	1,000	140,000	140,000	419,900	1 h 8 min	Tech Center Lv. 10, Tank ATK I Lv. 1, Tank DEF I Lv. 1
2	3,300	713,800	713,800	2,141,500	3 h 49 min	Tech Center Lv. 13
3	6,600	1,539,000	1,539,000	4,617,100	1 d 3 h 32 min	Tech Center Lv. 16, Tank ATK I Lv. 3, Tank DEF I Lv. 3
4	13,300	6,232,300	6,232,300	18,696,900	5 d 14 h 45 min	Tech Center Lv. 19
5	24,800	18,846,500	18,846,500	56,539,500	16 d 12 h 10 min	Tech Center Lv. 22
Total		27,471,600	27,471,600	82,414,900	23 d 11 h 24 min

Aircraft Firepower I

Level	Power	Food	Iron	Coin	Time	Requirements
1	1,100	168,000	168,000	503,900	1 h 42 min	Tech Center Lv. 11, Tank HP I Lv. 1
2	3,500	785,200	785,200	2,355,700	7 h 15 min	Tech Center Lv. 14
3	7,900	2,739,500	2,739,500	8,218,400	2 d 1 h 33 min	Tech Center Lv. 17, Tank HP I Lv. 3
4	15,200	7,478,800	7,478,800	22,436,300	8 d 10 h 8 min	Tech Center Lv. 20
5	28,300	24,500,500	24,500,500	73,501,400	21 d 11 h 1 min	Tech Center Lv. 23
Total		35,672,000	35,672,000	107,015,700	32 d 7 h 39 min

Aircraft ATK I

Level	Power	Food	Iron	Coin	Time	Requirements
1	1,800	419,900	419,900	1,259,700	2 h 33 min	Tech Center Lv. 12, Aircraft Firepower I Lv. 1
2	4,600	1,099,300	1,099,300	3,297,900	14 h 30 min	Tech Center Lv. 15
3	9,600	3,561,300	3,561,300	10,684,000	3 d 12 h 14 min	Tech Center Lv. 18, Aircraft Firepower I Lv. 3
4	19,400	13,461,800	13,461,800	40,385,400	11 d 18 h 59 min	Tech Center Lv. 21
5	34,100	30,625,600	30,625,600	91,876,700	27 d 21 h 32 min	Tech Center Lv. 24
Total		49,167,900	49,167,900	147,503,700	43 d 21 h 48 min

Aircraft DEF I

Level	Power	Food	Iron	Coin	Time	Requirements
1	1,800	419,900	419,900	1,259,700	2 h 33 min	Tech Center Lv. 12, Aircraft Firepower I Lv. 1
2	4,600	1,099,300	1,099,300	3,297,900	14 h 30 min	Tech Center Lv. 15
3	9,600	3,561,300	3,561,300	10,684,000	3 d 12 h 14 min	Tech Center Lv. 18, Aircraft Firepower I Lv. 3
4	19,400	13,461,800	13,461,800	40,385,400	11 d 18 h 59 min	Tech Center Lv. 21
5	34,100	30,625,600	30,625,600	91,876,700	27 d 21 h 32 min	Tech Center Lv. 24
Total		49,167,900	49,167,900	147,503,700	43 d 21 h 48 min

Aircraft HP I

Level	Power	Food	Iron	Coin	Time	Requirements
1	2,300	713,800	713,800	2,141,500	3 h 49 min	Tech Center Lv. 13, Aircraft ATK I Lv. 1, Aircraft DEF I Lv. 1
2	5,600	1,539,000	1,539,000	4,617,100	1 d 3 h 32 min	Tech Center Lv. 16
3	12,300	6,232,300	6,232,300	18,696,900	5 d 14 h 45 min	Tech Center Lv. 19, Aircraft ATK I Lv. 3, Aircraft DEF I Lv. 3
4	23,800	18,846,500	18,846,500	56,539,500	16 d 12 h 10 min	Tech Center Lv. 22
5	40,200	38,282,000	38,282,000	114,845,900	33 d 11 h 26 min	Tech Center Lv. 25
Total		65,613,600	65,613,600	196,840,900	56 d 21 h 42 min

Infantry Firepower II

Level	Power	Food	Iron	Coin	Time	Requirements
1	2,400	785,200	785,200	2,355,700	7 h 15 min	Tech Center Lv. 14, Aircraft HP I Lv. 1
2	6,800	2,739,500	2,739,500	8,218,400	2 d 1 h 33 min	Tech Center Lv. 17
3	14,100	7,478,800	7,478,800	22,436,300	8 d 10 h 8 min	Tech Center Lv. 20, Aircraft HP I Lv. 3
4	27,200	24,500,500	24,500,500	73,501,400	21 d 11 h 1 min	Tech Center Lv. 23
5	48,600	65,079,300	65,079,300	195,238,000	40 d 4 h 7 min	Tech Center Lv. 26
Total		100,583,300	100,583,300	301,749,800	72 d 10 h 4 min

Infantry ATK II

Level	Power	Food	Iron	Coin	Time	Requirements
1	2,800	1,099,300	1,099,300	3,297,900	14 h 30 min	Tech Center Lv. 15, Infantry Firepower II Lv. 1
2	7,800	3,561,300	3,561,300	10,684,000	3 d 12 h 14 min	Tech Center Lv. 18
3	17,600	13,461,800	13,461,800	40,385,400	11 d 18 h 59 min	Tech Center Lv. 21, Infantry Firepower II Lv. 3
4	32,300	30,625,600	30,625,600	91,876,700	27 d 21 h 32 min	Tech Center Lv. 24
5	57,600	91,111,100	91,111,100	273,333,300	48 d 4 h 56 min	Tech Center Lv. 27
Total		139,859,100	139,859,100	419,577,300	92 d 11 min

Infantry DEF II

Level	Power	Food	Iron	Coin	Time	Requirements
1	2,800	1,099,300	1,099,300	3,297,900	14 h 30 min	Tech Center Lv. 15, Infantry Firepower II Lv. 1
2	7,800	3,561,300	3,561,300	10,684,000	3 d 12 h 14 min	Tech Center Lv. 18
3	17,600	13,461,800	13,461,800	40,385,400	11 d 18 h 59 min	Tech Center Lv. 21, Infantry Firepower II Lv. 3
4	32,300	30,625,600	30,625,600	91,876,700	27 d 21 h 32 min	Tech Center Lv. 24
5	57,600	91,111,100	91,111,100	273,333,300	48 d 4 h 56 min	Tech Center Lv. 27
Total		139,859,100	139,859,100	419,577,300	92 d 11 min

Infantry HP II

Level	Power	Food	Iron	Coin	Time	Requirements
1	3,300	1,539,000	1,539,000	4,617,100	1 d 3 h 32 min	Tech Center Lv. 16, Infantry ATK II Lv. 1, Infantry DEF II Lv. 1
2	10,000	6,232,300	6,232,300	18,696,900	5 d 14 h 45 min	Tech Center Lv. 19
3	21,500	18,846,500	18,846,500	56,539,500	16 d 12 h 10 min	Tech Center Lv. 22, Infantry ATK II Lv. 3, Infantry DEF II Lv. 3
4	37,900	38,282,000	38,282,000	114,845,900	33 d 11 h 26 min	Tech Center Lv. 25
5	66,700	118,444,400	118,444,400	355,333,200	57 d 20 h 19 min	Tech Center Lv. 28
Total		183,344,200	183,344,200	550,032,600	114 d 14 h 12 min

Tank Firepower II

Level	Power	Food	Iron	Coin	Time	Requirements
1	4,400	2,739,500	2,739,500	8,218,400	2 d 1 h 33 min	Tech Center Lv. 17, Infantry HP II Lv. 1
2	11,700	7,478,800	7,478,800	22,436,300	8 d 10 h 8 min	Tech Center Lv. 20
3	24,800	24,500,500	24,500,500	73,501,400	21 d 11 h 1 min	Tech Center Lv. 23, Infantry HP II Lv. 3
4	46,200	65,079,300	65,079,300	195,238,000	40 d 4 h 7 min	Tech Center Lv. 26
5	80,300	165,822,200	165,822,200	497,466,500	69 d 9 h 59 min	Tech Center Lv. 29
Total		265,620,300	265,620,300	796,860,600	141 d 12 h 48 min

Tank ATK II

Level	Power	Food	Iron	Coin	Time	Requirements
1	5,000	3,561,300	3,561,300	10,684,000	3 d 12 h 14 min	Tech Center Lv. 18, Tank Firepower II Lv. 1
2	14,800	13,461,800	13,461,800	40,385,400	11 d 18 h 59 min	Tech Center Lv. 21
3	29,500	30,625,600	30,625,600	91,876,700	27 d 21 h 32 min	Tech Center Lv. 24, Tank Firepower II Lv. 3
4	54,800	91,111,100	91,111,100	273,333,300	48 d 4 h 56 min	Tech Center Lv. 27
5	95,200	232,151,000	232,151,000	696,453,100	83 d 7 h 11 min	Tech Center Lv. 30
Total		370,910,800	370,910,800	1,112,732,500	174 d 16 h 52 min

Tank DEF II

Level	Power	Food	Iron	Coin	Time	Requirements
1	5,000	3,561,300	3,561,300	10,684,000	3 d 12 h 14 min	Tech Center Lv. 18, Tank Firepower II Lv. 1
2	14,800	13,461,800	13,461,800	40,385,400	11 d 18 h 59 min	Tech Center Lv. 21
3	29,500	30,625,600	30,625,600	91,876,700	27 d 21 h 32 min	Tech Center Lv. 24, Tank Firepower II Lv. 3
4	54,800	91,111,100	91,111,100	273,333,300	48 d 4 h 56 min	Tech Center Lv. 27
5	95,200	232,151,000	232,151,000	696,453,100	83 d 7 h 11 min	Tech Center Lv. 30
Total		370,910,800	370,910,800	1,112,732,500	174 d 16 h 52 min

Tank HP II

Level	Power	Food	Iron	Coin	Time	Requirements
1	6,700	6,232,300	6,232,300	18,696,900	5 d 14 h 45 min	Tech Center Lv. 19, Tank ATK II Lv. 1, Tank DEF II Lv. 1
2	18,200	18,846,500	18,846,500	56,539,500	16 d 12 h 10 min	Tech Center Lv. 22
3	34,600	38,282,000	38,282,000	114,845,900	33 d 11 h 26 min	Tech Center Lv. 25, Tank ATK II Lv. 3, Tank DEF II Lv. 3
4	63,400	118,444,400	118,444,400	355,333,200	57 d 20 h 19 min	Tech Center Lv. 28
5	103,800	232,151,000	232,151,000	696,453,100	83 d 7 h 11 min	Tech Center Lv. 30
Total		413,956,200	413,956,200	1,241,868,600	196 d 17 h 51 min

Aircraft Firepower II

Level	Power	Food	Iron	Coin	Time	Requirements
1	7,300	7,478,800	7,478,800	22,436,300	8 d 10 h 8 min	Tech Center Lv. 20, Tank HP II Lv. 1
2	20,400	24,500,500	24,500,500	73,501,400	21 d 11 h 1 min	Tech Center Lv. 23
3	41,800	65,079,300	65,079,300	195,238,000	40 d 4 h 7 min	Tech Center Lv. 26, Tank HP II Lv. 3
4	70,600	118,444,400	118,444,400	355,333,200	57 d 20 h 19 min	Tech Center Lv. 28
5	111,000	232,151,000	232,151,000	696,453,100	83 d 7 h 11 min	Tech Center Lv. 30
Total		447,654,000	447,654,000	1,342,962,000	211 d 4 h 46 min

Aircraft ATK II

Level	Power	Food	Iron	Coin	Time	Requirements
1	9,800	13,461,800	13,461,800	40,385,400	11 d 18 h 59 min	Tech Center Lv. 21, Aircraft Firepower II Lv. 1
2	24,500	30,625,600	30,625,600	91,876,700	27 d 21 h 32 min	Tech Center Lv. 24
3	49,800	91,111,100	91,111,100	273,333,300	48 d 4 h 56 min	Tech Center Lv. 27, Aircraft Firepower II Lv. 3
4	83,900	165,822,200	165,822,200	497,466,500	69 d 9 h 59 min	Tech Center Lv. 29
5	124,300	232,151,000	232,151,000	696,453,100	83 d 7 h 11 min	Tech Center Lv. 30
Total		533,171,700	533,171,700	1,599,515,000	240 d 14 h 37 min

Aircraft DEF II

Level	Power	Food	Iron	Coin	Time	Requirements
1	9,800	13,461,800	13,461,800	40,385,400	11 d 18 h 59 min	Tech Center Lv. 21, Aircraft Firepower II Lv. 1
2	24,500	30,625,600	30,625,600	91,876,700	27 d 21 h 32 min	Tech Center Lv. 24
3	49,800	91,111,100	91,111,100	273,333,300	48 d 4 h 56 min	Tech Center Lv. 27, Aircraft Firepower II Lv. 3
4	83,900	165,822,200	165,822,200	497,466,500	69 d 9 h 59 min	Tech Center Lv. 29
5	124,300	232,151,000	232,151,000	696,453,100	83 d 7 h 11 min	Tech Center Lv. 30
Total		533,171,700	533,171,700	1,599,515,000	240 d 14 h 37 min

Aircraft HP II

Level	Power	Food	Iron	Coin	Time	Requirements
1	11,500	18,846,500	18,846,500	56,539,500	16 d 12 h 10 min	Tech Center Lv. 22, Aircraft ATK II Lv. 1, Aircraft DEF II Lv. 1
2	26,200	30,625,600	30,625,600	91,876,700	27 d 21 h 32 min	Tech Center Lv. 24
3	47,600	65,079,300	65,079,300	195,238,000	40 d 4 h 7 min	Tech Center Lv. 26, Aircraft ATK II Lv. 3, Aircraft DEF II Lv. 3
4	76,400	118,444,400	118,444,400	355,333,200	57 d 20 h 19 min	Tech Center Lv. 28
5	116,800	232,151,000	232,151,000	696,453,100	83 d 7 h 11 min	Tech Center Lv. 30
Total		465,146,800	465,146,800	1,395,440,500	225 d 17 h 19 min

Firepower Boost

Level	Power	Food	Iron	Coin	Time	Requirements
1	13,100	24,500,500	24,500,500	73,501,400	21 d 11 h 1 min	Tech Center Lv. 23, Aircraft HP II Lv. 1
2	29,500	38,282,000	38,282,000	114,845,900	33 d 11 h 26 min	Tech Center Lv. 25
3	54,800	91,111,100	91,111,100	273,333,300	48 d 4 h 56 min	Tech Center Lv. 27, Aircraft HP II Lv. 3
4	88,900	165,822,200	165,822,200	497,466,500	69 d 9 h 59 min	Tech Center Lv. 29
5	129,300	232,151,000	232,151,000	696,453,100	83 d 7 h 11 min	Tech Center Lv. 30
Total		551,866,800	551,866,800	1,655,600,200	255 d 20 h 33 min

ATK Boost

Level	Power	Food	Iron	Coin	Time	Requirements
1	14,700	30,625,600	30,625,600	91,876,700	27 d 21 h 32 min	Tech Center Lv. 24, Firepower Boost Lv. 1
2	36,100	65,079,300	65,079,300	195,238,000	40 d 4 h 7 min	Tech Center Lv. 26
3	64,900	118,444,400	118,444,400	355,333,200	57 d 20 h 19 min	Tech Center Lv. 28, Firepower Boost Lv. 3
4	99,000	165,822,200	165,822,200	497,466,500	69 d 9 h 59 min	Tech Center Lv. 29
5	139,400	232,151,000	232,151,000	696,453,100	83 d 7 h 11 min	Tech Center Lv. 30
Total		612,122,500	612,122,500	1,836,367,500	278 d 15 h 8 min

DEF Boost

Level	Power	Food	Iron	Coin	Time	Requirements
1	14,700	30,625,600	30,625,600	91,876,700	27 d 21 h 32 min	Tech Center Lv. 24, Firepower Boost Lv. 1
2	36,100	65,079,300	65,079,300	195,238,000	40 d 4 h 7 min	Tech Center Lv. 26
3	64,900	118,444,400	118,444,400	355,333,200	57 d 20 h 19 min	Tech Center Lv. 28, Firepower Boost Lv. 3
4	99,000	165,822,200	165,822,200	497,466,500	69 d 9 h 59 min	Tech Center Lv. 29
5	139,400	232,151,000	232,151,000	696,453,100	83 d 7 h 11 min	Tech Center Lv. 30
Total		612,122,500	612,122,500	1,836,367,500	278 d 15 h 8 min

HP Boost

Level	Power	Food	Iron	Coin	Time	Requirements
1	16,400	38,282,000	38,282,000	114,845,900	33 d 11 h 26 min	Tech Center Lv. 25, ATK Boost Lv. 1, DEF Boost Lv. 1
2	41,700	91,111,100	91,111,100	273,333,300	48 d 4 h 56 min	Tech Center Lv. 27
3	70,500	118,444,400	118,444,400	355,333,200	57 d 20 h 19 min	Tech Center Lv. 28, ATK Boost Lv. 3, DEF Boost Lv. 3
4	104,600	165,822,200	165,822,200	497,466,500	69 d 9 h 59 min	Tech Center Lv. 29
5	145,000	232,151,000	232,151,000	696,453,100	83 d 7 h 11 min	Tech Center Lv. 30
Total		645,810,700	645,810,700	1,937,432,000	292 d 5 h 51 min

Where these figures come from

From player sources and submitted screenshots.

Updated: 2026-10-02