Hero EXP is an important item needed to upgrade heroes. You can obtain Hero EXP from various sources, with the primary source being Training Bases, which generate a set amount of Hero EXP every minute.
Below is a chart showing the Hero EXP required for hero upgrades at each level.
| Hero Level | Hero EXP Required | Headquarters Level Required |
|---|---|---|
| 1 | – | – |
| 2 | 100 | 1 |
| 3 | 200 | 1 |
| 4 | 300 | 1 |
| 5 | 400 | 1 |
| 6 | 500 | 2 |
| 7 | 600 | 2 |
| 8 | 700 | 2 |
| 9 | 800 | 2 |
| 10 | 900 | 2 |
| 11 | 1,000 | 3 |
| 12 | 1,100 | 3 |
| 13 | 1,200 | 3 |
| 14 | 1,300 | 3 |
| 15 | 1,400 | 3 |
| 16 | 1,500 | 4 |
| 17 | 1,600 | 4 |
| 18 | 1,700 | 4 |
| 19 | 1,800 | 4 |
| 20 | 1,900 | 4 |
| 21 | 2,000 | 5 |
| 22 | 2,100 | 5 |
| 23 | 2,300 | 5 |
| 24 | 2,700 | 5 |
| 25 | 3,200 | 5 |
| 26 | 3,900 | 6 |
| 27 | 4,600 | 6 |
| 28 | 5,500 | 6 |
| 29 | 6,600 | 6 |
| 30 | 8,000 | 6 |
| 31 | 9,500 | 7 |
| 32 | 12,000 | 7 |
| 33 | 14,000 | 7 |
| 34 | 17,000 | 7 |
| 35 | 20,000 | 7 |
| 36 | 24,000 | 8 |
| 37 | 29,000 | 8 |
| 38 | 35,000 | 8 |
| 39 | 41,000 | 8 |
| 40 | 49,000 | 8 |
| 41 | 59,000 | 9 |
| 42 | 71,000 | 9 |
| 43 | 85,000 | 9 |
| 44 | 110,000 | 9 |
| 45 | 130,000 | 9 |
| 46 | 150,000 | 10 |
| 47 | 180,000 | 10 |
| 48 | 220,000 | 10 |
| 49 | 260,000 | 10 |
| 50 | 310,000 | 10 |
| 51 | 370,000 | 11 |
| 52 | 440,000 | 11 |
| 53 | 530,000 | 11 |
| 54 | 630,000 | 11 |
| 55 | 760,000 | 11 |
| 56 | 910,000 | 12 |
| 57 | 1,100,000 | 12 |
| 58 | 1,400,000 | 12 |
| 59 | 1,600,000 | 12 |
| 60 | 1,900,000 | 12 |
| 61 | 2,100,000 | 13 |
| 62 | 2,300,000 | 13 |
| 63 | 2,500,000 | 13 |
| 64 | 2,800,000 | 13 |
| 65 | 3,100,000 | 13 |
| 66 | 3,400,000 | 14 |
| 67 | 3,700,000 | 14 |
| 68 | 4,100,000 | 14 |
| 69 | 4,500,000 | 14 |
| 70 | 4,900,000 | 14 |
| 71 | 5,400,000 | 15 |
| 72 | 5,900,000 | 15 |
| 73 | 6,500,000 | 15 |
| 74 | 7,200,000 | 15 |
| 75 | 7,900,000 | 15 |
| 76 | 8,700,000 | 16 |
| 77 | 9,500,000 | 16 |
| 78 | 11,000,000 | 16 |
| 79 | 12,000,000 | 16 |
| 80 | 13,000,000 | 16 |
| 81 | 13,000,000 | 17 |
| 82 | 14,000,000 | 17 |
| 83 | 14,000,000 | 17 |
| 84 | 15,000,000 | 17 |
| 85 | 16,000,000 | 17 |
| 86 | 17,000,000 | 18 |
| 87 | 18,000,000 | 18 |
| 88 | 19,000,000 | 18 |
| 89 | 20,000,000 | 18 |
| 90 | 21,000,000 | 18 |
| 91 | 22,000,000 | 19 |
| 92 | 23,000,000 | 19 |
| 93 | 24,000,000 | 19 |
| 94 | 25,000,000 | 19 |
| 95 | 26,000,000 | 19 |
| 96 | 27,000,000 | 20 |
| 97 | 28,000,000 | 20 |
| 98 | 30,000,000 | 20 |
| 99 | 31,000,000 | 20 |
| 100 | 33,000,000 | 20 |
| 101 | 35,000,000 | 21 |
| 102 | 37,000,000 | 21 |
| 103 | 39,000,000 | 21 |
| 104 | 41,000,000 | 21 |
| 105 | 43,000,000 | 21 |
| 106 | 45,000,000 | 22 |
| 107 | 47,000,000 | 22 |
| 108 | 49,000,000 | 22 |
| 109 | 51,000,000 | 22 |
| 110 | 53,000,000 | 22 |
| 111 | 55,000,000 | 23 |
| 112 | 57,000,000 | 23 |
| 113 | 59,000,000 | 23 |
| 114 | 61,000,000 | 23 |
| 115 | 63,000,000 | 23 |
| 116 | 65,000,000 | 24 |
| 117 | 67,000,000 | 24 |
| 118 | 69,000,000 | 24 |
| 119 | 71,000,000 | 24 |
| 120 | 73,000,000 | 24 |
| 121 | 75,000,000 | 25 |
| 122 | 77,000,000 | 25 |
| 123 | 79,000,000 | 25 |
| 124 | 81,000,000 | 25 |
| 125 | 83,000,000 | 25 |
| 126 | 85,000,000 | 26 |
| 127 | 87,000,000 | 26 |
| 128 | 89,000,000 | 26 |
| 129 | 91,000,000 | 26 |
| 130 | 93,000,000 | 26 |
| 131 | 95,000,000 | 27 |
| 132 | 97,000,000 | 27 |
| 133 | 100,000,000 | 27 |
| 134 | 105,000,000 | 27 |
| 135 | 108,000,000 | 27 |
| 136 | 115,000,000 | 28 |
| 137 | 120,000,000 | 28 |
| 138 | 125,000,000 | 28 |
| 139 | 130,000,000 | 28 |
| 140 | 135,000,000 | 28 |
| 141 | 140,000,000 | 29 |
| 142 | 145,000,000 | 29 |
| 143 | 150,000,000 | 29 |
| 144 | 155,000,000 | 29 |
| 145 | 160,000,000 | 29 |
| 146 | 165,000,000 | 30 |
| 147 | 170,000,000 | 30 |
| 148 | 175,000,000 | 30 |
| 149 | 180,000,000 | 30 |
| 150 | 185,000,000 | 30 |