Minecraft
Specific redstone and entity-timing setups can duplicate primed TNT or related blocks in some versions and server types. It is one of Minecraft's best-known technical exploits.
Pistons, end crystals, or update-order tricks have allowed players to remove bedrock blocks that are supposed to be permanent. This changed access routes and farm designs.
Certain update timings once let crops, bamboo, and sugar cane grow almost instantly when pulsed by redstone. Players used it for dramatically accelerated resource generation.
Lighting glitches, transparent blocks, or resource-pack interactions have historically let players spot caves or ores through terrain. Server rules usually treat it as exploitative.
Boats and other rideable entities can force players through small gaps or blocks under the right conditions. Speedrunners and server players have long exploited entity collision this way.